CN104465307B - Metal halogen lamp pole and ceramic gold-halogen lamp - Google Patents
Metal halogen lamp pole and ceramic gold-halogen lamp Download PDFInfo
- Publication number
- CN104465307B CN104465307B CN201310442941.6A CN201310442941A CN104465307B CN 104465307 B CN104465307 B CN 104465307B CN 201310442941 A CN201310442941 A CN 201310442941A CN 104465307 B CN104465307 B CN 104465307B
- Authority
- CN
- China
- Prior art keywords
- tungsten
- metal halide
- halide lamp
- ball
- electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/073—Main electrodes for high-pressure discharge lamps
- H01J61/0735—Main electrodes for high-pressure discharge lamps characterised by the material of the electrode
- H01J61/0737—Main electrodes for high-pressure discharge lamps characterised by the material of the electrode characterised by the electron emissive material
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
The invention discloses a kind of metal halogen lamp pole and ceramic gold-halogen lamps.The metal halogen lamp pole includes tungsten electrode bar and molybdenum sheet, one end of the tungsten electrode bar is coaxially electrically connected with the molybdenum sheet, the other end outer surface is wound with tungsten filament helix, and the spherical or spheroidal several transmitting balls of class are folded between the adjoining spiral tungsten filament of the tungsten filament helix；Wherein, the transmitting ball is made of following weight percent composition：Hafnium oxide 0.05%~0.5%, lanthana 0.5%~3%, erbium oxide 0.05%~10%, surplus are tungsten.The electron work functon of the metal halogen lamp pole is low, effectively reduces the operating temperature of electrode and inhibits the evaporation and growth of tungsten metal, ensure the stabilization of tungsten metal grain structure, service life is long, and luminous efficiency is high.Ceramic gold-halogen lamp is using above-mentioned metal halogen lamp pole as positive and negative electrode, and therefore, the ceramic gold-halogen lamp Environmental Safety, light efficiency is high, and service life is long.
Description
Technical Field
The invention belongs to the technical field of lighting photoelectricity, and particularly relates to a metal halide lamp electrode and a ceramic metal halide lamp.
Background
In recent years, the ceramic metal halide lamp technology is mature day by day, the performance parameters are greatly improved and far surpass the traditional quartz metal halide lamp in all aspects, and the use of the ceramic metal halide lamp is rapidly popularized. Nevertheless, the performance of ceramic metal halide lamps is still to be perfected.
The electrode structure which is currently common for medium-power ceramic metal halide lamps is shown in fig. 1 and mainly comprises a molybdenum sheet (molybdenum foil) 02, said molybdenum sheet 02 having opposite ends, one end of which is coaxially connected to an electrode rod 01 (mainly consisting of tungsten and thorium dioxide alloy) and the other end of which is electrically connected to a lead-out wire 04 (mainly consisting of molybdenum), and a tungsten filament spiral 03 being electrically connected to the other end of the electrode rod 01, which is coaxially connected to the molybdenum sheet 02, wherein the electrode rod 01, as the starting end or the end of the discharge arc, has resistance to halide chemical corrosion at high temperature, and thorium dioxide in the electrode rod 01, as an emitting material, can reduce the work function of tungsten metal, which will facilitate the operation of the electrode rod 01 at lower temperature, effectively inhibit the evaporation of metal tungsten and the deposition on the wall of the arc tube, thus ensuring the normal operation of the metal halide lamp, thorium dioxide, as an emitting material, increases the luminous efficacy of the metal halide lamp, but is a radioactive element, and in addition to the discharge thorium dioxide, so that the luminous efficacy of thorium oxide, thorium dioxide, which forms radioactive particles, in addition to the emission of thorium, also increases the luminous efficacy of the discharge arc tube wall of the ceramic metal, and also increases the emission of thorium, so that the emission of thorium oxide, also increases the emission of thorium oxide, so that the emission of thorium, the emission of thorium, which is expected to be expected.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a thorium-free metal halide lamp electrode and a ceramic metal halide lamp with medium power, and aims to solve the technical problems of radioactive pollution and relatively poor luminous efficiency in production and use caused by taking thorium dioxide as an emission material in the conventional ceramic metal halide lamp.
In order to achieve the above object, the technical solution of the present invention is as follows:
a metal halide lamp electrode comprises a tungsten electrode rod and molybdenum sheets, wherein one end of the tungsten electrode rod is coaxially and electrically connected with the molybdenum sheets, a tungsten filament spiral is wound on the outer surface of the other end of the tungsten electrode rod, and a plurality of spherical or similar spherical emitting balls are clamped between adjacent spiral tungsten filaments of the tungsten filament spiral; the launching ball comprises the following components in percentage by weight:
0.05 to 0.5 percent of hafnium oxide;
0.5 to 3 percent of lanthanum oxide;
0.05 to 10 percent of erbium oxide;
the balance being tungsten.
The metal halide lamp electrode comprises a metal halide lamp electrode, a ceramic sleeve, a ceramic discharge cavity communicated with the ceramic sleeve and luminous pills arranged in the discharge cavity, one end of a tungsten electrode rod with a tungsten wire spiral wound on the surface of the metal halide lamp electrode and the tungsten wire spiral extend into the ceramic discharge cavity, and the other end of the tungsten electrode rod and the molybdenum sheets are sealed in the ceramic sleeve.
The metal halide lamp electrode is free of radiation by clamping the thorium-free transmitting ball in the tungsten wire spiral wound at one end of the tungsten electrode rod, and is safe and environment-friendly in production and use; in addition, the emitting ball has the advantages that through the synergistic effect of lanthanum oxide, hafnium oxide, erbium oxide and tungsten metal, the electronic work function of the metal halide lamp electrode is low, the working temperature of the electrode is effectively reduced, evaporation and growth of the tungsten metal are inhibited, the stability of the tungsten metal particle structure is ensured, the service life is long, and the luminous efficiency is high.
The ceramic metal halide lamp adopts the metal halide lamp electrode as the electrode, so that the ceramic metal halide lamp is environment-friendly and safe, high in luminous efficiency and long in service life.
Drawings
FIG. 1 is a schematic diagram of a conventional electrode structure of a metal halide lamp;
FIG. 2 is a schematic diagram of the structure of an electrode of a thorium-free metal halide lamp according to an embodiment of the invention;
FIG. 3 is a schematic flow chart of a method for preparing an emitting pellet in a thorium-free metal halide lamp electrode according to an embodiment of the invention;
FIG. 4 is a schematic structural diagram of a ceramic metal halide lamp according to an embodiment of the invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides a thorium-free metal halide lamp electrode 1 which is free of radiation, environment-friendly, safe and high in luminous efficiency, and the structure of the thorium-free metal halide lamp electrode is shown in figure 2. The metal halide lamp electrode 1 comprises a tungsten electrode rod 11 and a molybdenum sheet 12, wherein one end of the tungsten electrode rod 11 is coaxially and electrically connected with one end of the molybdenum sheet 12, a tungsten filament spiral 13 is wound on the outer surface of the other end of the tungsten electrode rod, a plurality of spherical or similar spherical launching balls 15 are clamped between adjacent spiral tungsten filaments 131 of the tungsten filament spiral 13, and the other end of the molybdenum sheet 12, which is opposite to the end of the tungsten electrode rod 11 which is coaxially and electrically connected, is also electrically connected with a leading-out wire 14.
Specifically, in the thorium-free metal halide lamp electrode 1 shown in FIG. 2, one end of the tungsten electrode rod 11 and one end of the molybdenum sheet 12 are electrically connected coaxially, and may be electrically connected using the lead wire 14. When the molybdenum sheet 12 is coaxially connected with the tungsten electrode rod 11, the molybdenum sheet 12 can effectively realize excellent airtightness at the tail end of the arc tube, so that the high-pressure gas discharge can be smoothly carried out. Of course, one end of the tungsten electrode rod 11 and one end of the molybdenum sheet 12 may be directly and coaxially welded, and when the tungsten electrode rod 11 and the molybdenum sheet 12 are connected by a direct welding method, a transition molybdenum sheet (not shown) may be additionally disposed at the welding position between one end of the tungsten electrode rod 11 and one end of the molybdenum sheet 12, in order to make the welding between the tungsten electrode rod 11 and the molybdenum sheet 12 firm. The other end of the molybdenum sheet 12, which is opposite to the end of the tungsten electrode rod 11 that is coaxially electrically connected, is also electrically connected to a lead wire 14. The lead wires 14 at the two locations are made of molybdenum as a main component.
The length of the tungsten wire spiral 13 wound around the outer surface of the other end portion of the tungsten electrode rod 11 opposite to the electrical connection end of the molybdenum plate 12 is not particularly limited, and may be designed according to the conventional length of the tungsten wire spiral in the art. Since the launching ball 15 is interposed between two adjacent spiral tungsten wires 131 in the above embodiment, the tungsten wire diameter of the tungsten wire spiral 13 should be sufficient to interpose the launching ball 15. The launching ball 15 comprises the following components in percentage by weight:
0.05 to 0.5 percent of hafnium oxide;
0.5 to 3 percent of lanthanum oxide;
0.05 to 10 percent of erbium oxide;
the balance being tungsten.
The emitting ball 15 makes the electronic work function of the metal halide lamp electrode 1 low through the synergistic effect of lanthanum oxide, hafnium oxide, erbium oxide and tungsten metal, effectively reduces the working temperature of the metal halide lamp electrode 1 and inhibits the evaporation and growth of tungsten metal, ensures the stability of the tungsten metal particle structure, has long service life and high luminous efficiency. Specifically, the lanthanum oxide constituting the emitter ball 15 is effective in reducing the work function of tungsten metal, thereby reducing the electron work function of the metal halide lamp electrode 1, thereby effectively reducing the operating temperature of the metal halide lamp electrode 1 and suppressing the evaporation of tungsten metal; the hafnium oxide and the lanthanum oxide can generate a stable mixture, and the volatilization of the lanthanum oxide in the work process is effectively inhibited, so that when the metal halide lamp electrode 1 works, the time of the lanthanum oxide diffusing from the interior of the emission ball 15 to the surface of the emission ball 15 along the surface of tungsten particles is prolonged, and the service life of the metal halide lamp is prolonged; the erbium oxide can effectively inhibit the growth of tungsten metal particles, and the particle structure is controllable, the particle size is small, and the stability of the tungsten metal particle structure is maintained.
In a specific embodiment, the hafnium oxide may be present in the emitter ball 15 in an amount of 0.05%, 0.1%, 0.15%, 0.2%, 0.25%, 0.30%, 0.35%, 0.40%, 0.45%, 0.50% by weight; the weight percentage of lanthanum oxide can be 0.5%, 0.8%, 1%, 1.5%, 2%, 2.5%, 3%; the erbium oxide may be present in an amount of 0.05%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 6%, 6.5%, 7%, 8%, 9%, 10% by weight.
In order to make the emitting balls 15 better play their roles, make the electron work function of the metal halide lamp electrode 1 lower, and make the metal halide lamp light effect higher, as the preferred embodiment of the invention, the emitting balls 15 are alternately sandwiched between the adjacent spiral tungsten wires 131 of the tungsten wire spiral 13, and the distance between every two adjacent emitting balls 15 sandwiched between the same adjacent spiral tungsten wires 131 is 0.05 mm-0.1 mm. In a specific embodiment, the spacing between two adjacent launching balls 15 may be equal to 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.10 mm.
As another preferred embodiment of the present invention, the diameter of the launching ball 15 in the above embodiments is 0.1mm to 0.3 mm. In a specific embodiment, the diameter of the launching ball 15 may be 0.1mm, 0.15mm, 0.20mm, 0.25mm, 0.3mm, etc., and more preferably 0.20 mm.
As another preferred embodiment of the present invention, the launching balls 15 in the above embodiments are prepared according to the process shown in fig. 3, which includes the following steps:
s01, preparing a mixed material of hafnium oxide, lanthanum oxide, erbium oxide and tungsten powder by ball milling: mixing hafnium oxide, lanthanum oxide, erbium oxide and tungsten powder in proportion, and then performing ball milling treatment in vacuum or inert gas atmosphere to obtain a mixed material;
s02, preparing the launching ball 15 by die pressing and sintering the mixed material: the mixture prepared in the step S01 is molded into spherical or similar spherical particles, then is placed in a reducing atmosphere to be sintered at 1460-1480 ℃, and is continuously cooled in the reducing atmosphere.
Specifically, the mixing ratio of the hafnium oxide, the lanthanum oxide, the erbium oxide and the tungsten powder in the step S01 is, for example, 0.05% to 0.5% of the hafnium oxide, 0.5% to 3% of the lanthanum oxide, 0.05% to 10% of the erbium oxide and the balance of tungsten, based on 100% of the total weight of the four powders. In particular embodiments, the weight percent content of hafnium oxide may be 0.05%, 0.1%, 0.15%, 0.2%, 0.25%, 0.30%, 0.35%, 0.40%, 0.45%, 0.50%; the weight percentage of lanthanum oxide can be 0.5%, 0.8%, 1%, 1.5%, 2%, 2.5%, 3%; the erbium oxide may be present in an amount of 0.05%, 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 6%, 6.5%, 7%, 8%, 9%, 10% by weight.
In step S01, in order to mix the components of the hafnium oxide, lanthanum oxide, erbium oxide and tungsten powder more uniformly in the ball milling process and provide the ball milling efficiency, in a preferred embodiment, the hafnium oxide, lanthanum oxide, erbium oxide and tungsten powder with a particle size of 2 μm to 5 μm are selected as the raw material.
In a further preferred embodiment, the process conditions of the ball milling process in step S01 are: tungsten balls are used as ball milling media, the ball milling rotating speed is 180 r/min-250 r/min, the ball-material ratio is (8-15) to 1, the ball filling coefficient is 5% -9%, and the ball milling time is 30 h-60 h. The technological conditions of the ball milling treatment in the preferred embodiment can make the four components more uniformly mixed after ball milling, and the ball milling efficiency is high.
In a specific embodiment, the process conditions of the ball milling treatment are as follows: tungsten balls are used as ball milling media, the ball milling rotating speed is 200r/min, the ball material ratio is 10: 1, the ball filling coefficient is 6%, and the ball milling time is 40 h.
In step S01, when the ball milling process is performed in an inert gas, the inert gas may be Ar, but other inert gases may be used if conditions allow.
In step S02, the molding conditions of the mixture formed by ball milling the hafnium oxide, lanthanum oxide, erbium oxide, and tungsten powder are preferably as follows: 500MPa to 2700MPa, and 5min to 30min, preferably 2000MPa, and 10 min. Under the optimized molding condition, the mixture pellets obtained after molding are compact, and the mixture pellets are not easy to loose in sintering, so that the emission pellets 15 obtained after the treatment under the optimized molding condition and the calcination are compact, the spherical or quasi-spherical structure is stable, and the emission performance is more excellent, thereby prolonging the service life of the metal halide lamp electrode 1.
In step S02, when the sintering process is performed at a temperature of 1460 to 1480 ℃, the sintering temperature is preferably 20 to 50min, and more preferably 30 min. The preferred sintering temperature and time can enable the hafnium oxide, lanthanum oxide, erbium oxide and tungsten powder mixture to be fully sintered, so that the final launching sphere 15 is stable in structure and performance and compact.
As a preferred embodiment, the reducing atmosphere of the sintering process is a hydrogen reducing atmosphere, which can ensure that the tungsten powder in the mixture is not oxidized, and at the same time, can also improve the density of the finished product of the emitting ball 15 and reduce the porosity, thereby further improving the performance of the emitting ball 15 and prolonging the service life of the metal halide lamp electrode 1.
After the sintering treatment of the above embodiment, the ball weight of the launching ball 15 is 0.1mg to 0.5 mg.
Therefore, the metal halide lamp electrode 1 in the above embodiment adopts lanthanum oxide, hafnium oxide, erbium oxide and tungsten metal as the emitting material, and replaces the existing electrode with thorium dioxide, so that the metal halide lamp electrode 1 has no radiation during production and use, and is safe and environment-friendly. Lanthanum oxide, hafnium oxide, erbium oxide and tungsten metal emitting materials are made into a globular shape, and the globular shape, namely the emitting ball 15 in fig. 2 is clamped between the adjacent spiral tungsten wires 131 of the tungsten wire spiral 13, preferably, the emitting ball 15 is clamped between the adjacent spiral tungsten wires 131 at intervals, through the synergistic effect of the lanthanum oxide, the hafnium oxide, the erbium oxide and the tungsten metal in the emitting ball 15 and the arrangement of the position of the emitting ball 15, the electronic work function of the metal halide lamp electrode 1 is low, the working temperature of the electrode 1 is effectively reduced, the evaporation and growth of the tungsten metal are inhibited, the stability of the tungsten metal particle structure is ensured, the service life is long, and the light efficiency is high.
Correspondingly, the embodiment of the invention also provides a medium-power ceramic metal halide lamp which is safe, environment-friendly, high in luminous efficiency and long in service life, and the structure of the ceramic metal halide lamp is shown in fig. 4, and the ceramic metal halide lamp comprises the metal halide lamp electrode 1, the ceramic sleeve 2, the ceramic discharge cavity 3 communicated with the ceramic sleeve 2 and the luminous pills 4 arranged in the discharge cavity 3, wherein one end of a tungsten electrode rod 11 with a tungsten wire spiral 13 wound on the surface of the metal halide lamp electrode 1 and the tungsten wire spiral 13 extend into the ceramic discharge cavity 3, and the other end of the tungsten electrode rod 11 and the molybdenum sheet 12 are sealed in the ceramic sleeve 2. In the ceramic metal halide lamp, the existing luminous pill can be directly selected as the luminous pill 4, the method for sealing the other end of the tungsten electrode rod 11 and the molybdenum sheet 12 in the ceramic sleeve 2 and the sealing material can both adopt the existing packaging method of the ceramic metal halide lamp, and due to the existence of the molybdenum sheet 12, the ceramic sleeve 2 has excellent air tightness after being packaged in a sealing way, thereby ensuring the smooth operation of high-pressure gas discharge. After the ceramic sleeve 2 is packaged, a lead-out wire 14 electrically connected with one end of the molybdenum sheet 12 extends out of the ceramic sleeve 2 so as to be connected with a power supply.
In a preferred embodiment, the luminous pill 4 disposed in the ceramic discharge chamber 3 is made of sodium iodide, thallium iodide and indium iodide, and the molar ratio of sodium iodide, thallium iodide and indium iodide is (0.005-0.015): 6.0 × 10-4～7.0×10-4):(4.0×10-5～4.7×10-5). The optimal proportion can ensure that the formed luminous pill 4 has good luminous efficiency, color rendering index and color temperature.
Specifically, the preparation method of the luminous pill 4 is preferably as follows:
mixing the luminescent compositions of sodium iodide, thallium iodide and indium iodide uniformly to form a mixture, placing the mixture in a quartz container with a nozzle, carrying out pre-vacuum treatment at 110-150 ℃, preferably 130 ℃, for 40-60 min, preferably 50min, then slowly heating until the mixture is molten, after stirring treatment, for example stirring for 30min, ejecting the molten mixture from the nozzle, rapidly cooling the molten liquid beads in the mass transfer process of high-purity inert gas such as argon to solidify into spheres, and finally further removing trace impurity gas adsorbed on the surfaces of the spheres from the obtained product in a molecular pump high-vacuum system, wherein in H2O and O2Sieving is carried out in a glove box with the content of less than 1 ppm. The product can be used for the production of ceramic metal halide lamps after being inspected to be qualified. Wherein,slowly heating until the temperature rising rate of the mixture melting is 1-3 ℃/min.
In a further preferred embodiment, in the above-mentioned ceramic metal halide lamp embodiment, the diameter of the luminous pill 4 is 0.3mm to 0.8mm, preferably 0.5 mm; the granule weight is 0.3mg to 1.1mg, preferably 0.5 mg. The luminous pills 4 with the optimized size and the weight can be more conveniently, quickly and accurately injected into the ceramic discharge chamber 3 through the pill injector.
The power of the ceramic metal halide lamp including the thorium-free metal halide lamp electrode 1 shown in FIG. 2 is preferably 150W to 400W.
Therefore, the ceramic metal halide lamp adopts the metal halide lamp electrode 1 as an electrode, so that the ceramic metal halide lamp is environment-friendly and safe, high in luminous efficiency and long in service life. Further, the ceramic metal halide lamp has excellent luminous efficiency and color temperature through the blending of the components and the content of the luminous pills 4.
The structure and performance of the metal halide lamp electrode and the ceramic metal halide lamp according to the embodiment of the present invention will now be described in further detail with reference to specific examples.
Example 1
A metal halide lamp electrode constructed as hereinbefore described with reference to and as shown in figure 2, and a ceramic metal halide lamp constructed as hereinbefore described with reference to and as shown in figure 4. Wherein, the components of the transmitting ball 15 in the metal halide lamp electrode 1 are as follows: 0.05 wt% of hafnium oxide, 1 wt% of lanthanum oxide, 6 wt% of erbium oxide and the balance of tungsten, the average diameter of the tungsten is 0.1mm, the tungsten is clamped between adjacent spiral tungsten wires 131 of the tungsten wire spiral 13 at intervals, and the average distance between every two adjacent launching balls 15 clamped between the same adjacent spiral tungsten wires 131 is 0.05 mm.
The preparation method of the launching ball 15 is as follows:
putting hafnium oxide, lanthanum oxide, erbium oxide and tungsten metal particle powder with the average particle size range of 3 mu m into a high-energy ball mill according to the proportion of 0.05 wt% of hafnium oxide, 1 wt% of lanthanum oxide, 6 wt% of erbium oxide and the balance of tungsten, adding a tungsten ball milling medium, carrying out high-energy ball milling on the powder by adopting Ar as a protective atmosphere, wherein the ball milling process comprises the steps of ball milling at the rotating speed of 200r/min, the ball-material ratio of 10: 1, the ball packing coefficient of 6%, ball milling time of 40h, then carrying out die pressing on the powder to form 0.1mm spherical particles, sintering at 1470 +/-10 ℃ for 30min in a protective atmosphere of hydrogen, and cooling in the protective atmosphere of hydrogen to obtain the transmitting ball 15.
The ceramic metal halide lamp is arranged in the luminous pill 4 in the discharge chamber 3, and the molar ratio of sodium iodide, thallium iodide and indium iodide is 0.01:6.6 multiplied by 10-4:4.4×10-5. The preparation method comprises the following steps:
the molar ratio is 0.01: 6.6X 10-4:4.4×10-5Sodium iodide, thallium iodide and indium iodide are mixed evenly to form a mixture, then the mixture is placed in a quartz container with a nozzle, the mixture is pre-vacuumized for 50 minutes at the temperature of 130 ℃, then the mixture is heated slowly until the mixture is melted, the mixture is stirred for 30 minutes, the melted mixture is sprayed out from the nozzle, the melted liquid beads are rapidly cooled and solidified into balls in the mass transfer process of high-purity argon, then the obtained product is further removed of trace impurity gas adsorbed on the surfaces of the balls in a molecular pump high vacuum system, and H is treated2O and O2Sieving in a glove box with content less than 1ppm, and inspecting. The diameter of the prepared luminous pill 4 is 0.5mm, and the weight of the luminous pill is 0.5 mg.
The power of the ceramic metal halide lamp was set to 400W.
Example 2
A metal halide lamp electrode constructed as hereinbefore described with reference to and as shown in figure 2, and a ceramic metal halide lamp constructed as hereinbefore described with reference to and as shown in figure 4. Wherein, the components of the transmitting ball 15 in the metal halide lamp electrode 1 are as follows: 0.1 wt% of hafnium oxide, 1 wt% of lanthanum oxide, 6 wt% of erbium oxide and the balance of tungsten, wherein the average diameter of the tungsten is 0.2mm, the tungsten is alternately clamped between adjacent spiral tungsten wires 131 of the tungsten wire spiral 13, and the average distance between every two adjacent launching balls 15 clamped between the same adjacent spiral tungsten wires 131 is 0.07 mm.
The preparation method of the launching ball 15 refers to the preparation method of the launching ball 15 in the embodiment 1, wherein the ball milling process comprises the steps of ball milling at the rotating speed of 180r/min, ball-material ratio of 8: 1, ball packing coefficient of 5% and ball milling time of 40h, then molding powder, pressing into 0.2mm spherical particles, and then sintering at 1470 +/-10 ℃ for 20min in the protective atmosphere of hydrogen.
The ceramic metal halide lamp is arranged in the luminous pill 4 in the discharge chamber 3 as in the luminous pill in the embodiment 1.
The power of the ceramic metal halide lamp was set to 400W.
Example 3
A metal halide lamp electrode constructed as hereinbefore described with reference to and as shown in figure 2, and a ceramic metal halide lamp constructed as hereinbefore described with reference to and as shown in figure 4. Wherein, the components of the transmitting ball 15 in the metal halide lamp electrode 1 are as follows: 0.3 wt% of hafnium oxide, 1 wt% of lanthanum oxide, 6 wt% of erbium oxide and the balance of tungsten, wherein the average diameter of the tungsten is 0.3mm, the tungsten is alternately clamped between adjacent spiral tungsten wires 131 of the tungsten wire spiral 13, and the average distance between every two adjacent launching balls 15 clamped between the same adjacent spiral tungsten wires 131 is 0.1 mm.
The preparation method of the launching ball 15 refers to the preparation method of the launching ball 15 in the embodiment 1, wherein the ball milling process comprises the steps of ball milling at the rotating speed of 250r/min, the ball-material ratio of 15: 1, the ball packing coefficient of 9 percent and the ball milling time of 60 hours, then molding and forming powder, pressing the powder into 0.3mm spherical particles, and then sintering the spherical particles at 1470 +/-10 ℃ for 30 minutes in the protective atmosphere of hydrogen.
The ceramic metal halide lamp is arranged in the luminous pill 4 in the discharge chamber 3 as in the luminous pill in the embodiment 1.
The power of the ceramic metal halide lamp was set to 400W.
Example 4
A metal halide lamp electrode constructed as hereinbefore described with reference to and as shown in figure 2, and a ceramic metal halide lamp constructed as hereinbefore described with reference to and as shown in figure 4. Wherein, the components of the transmitting ball 15 in the metal halide lamp electrode 1 are as follows: 0.5 wt% of hafnium oxide, 1 wt% of lanthanum oxide, 6 wt% of erbium oxide and the balance of tungsten, wherein the average diameter of the tungsten is 0.2mm, the tungsten is alternately clamped between adjacent spiral tungsten wires 131 of the tungsten wire spiral 13, and the average distance between every two adjacent launching balls 15 clamped between the same adjacent spiral tungsten wires 131 is 0.07 mm.
The preparation method of the launching ball 15 refers to the preparation method of the launching ball 15 in the embodiment 1, wherein the ball milling process comprises the steps of ball milling at the rotating speed of 180r/min, ball-material ratio of 8: 1, ball packing coefficient of 5% and ball milling time of 40h, then molding powder, pressing into 0.2mm spherical particles, and then sintering at 1470 +/-10 ℃ for 20min in the protective atmosphere of hydrogen.
The ceramic metal halide lamp is arranged in the luminous pill 4 in the discharge chamber 3 as in the luminous pill in the embodiment 1.
The power of the ceramic metal halide lamp was set to 400W.
Example 5
A metal halide lamp electrode constructed as hereinbefore described with reference to and as shown in figure 2, and a ceramic metal halide lamp constructed as hereinbefore described with reference to and as shown in figure 4. Wherein, the components of the transmitting ball 15 in the metal halide lamp electrode 1 are as follows: 0.1 wt% of hafnium oxide, 0.5 wt% of lanthanum oxide, 6 wt% of erbium oxide and the balance of tungsten, the average diameter of which is 0.2mm, the spacing of which is clamped between adjacent spiral tungsten filaments 131 of the tungsten filament spiral 13, and the average distance between every two adjacent launching balls 15 clamped between the same adjacent spiral tungsten filaments 131 is 0.07 mm.
The preparation method of the launching ball 15 refers to the preparation method of the launching ball 15 in the embodiment 1, wherein the ball milling process comprises the steps of ball milling at the rotating speed of 200r/min, the ball-material ratio of 9: 1, the ball packing coefficient of 7 percent and the ball milling time of 50h, then molding and forming powder, pressing the powder into 0.2mm spherical particles, and then sintering the spherical particles for 50min at 1470 +/-10 ℃ in the protective atmosphere of hydrogen.
The ceramic metal halide lamp is arranged in the luminous pill 4 in the discharge chamber 3 as in the luminous pill in the embodiment 1.
The power of the ceramic metal halide lamp was set to 400W.
Example 6
A metal halide lamp electrode constructed as hereinbefore described with reference to and as shown in figure 2, and a ceramic metal halide lamp constructed as hereinbefore described with reference to and as shown in figure 4. Wherein, the components of the transmitting ball 15 in the metal halide lamp electrode 1 are as follows: 0.1 wt% of hafnium oxide, 3 wt% of lanthanum oxide, 6 wt% of erbium oxide and the balance of tungsten, the average diameter of the tungsten is 0.2mm, the tungsten is clamped between adjacent spiral tungsten wires 131 of the tungsten wire spiral 13 at intervals, and the average distance between every two adjacent launching balls 15 clamped between the same adjacent spiral tungsten wires 131 is 0.07 mm.
The preparation method of the launching ball 15 refers to the preparation method of the launching ball 15 in the embodiment 1, wherein the ball milling process comprises the steps of ball milling at the rotating speed of 180r/min, ball-material ratio of 8: 1, ball packing coefficient of 5% and ball milling time of 40h, then molding powder, pressing into 0.2mm spherical particles, and then sintering at 1470 +/-10 ℃ for 20min in the protective atmosphere of hydrogen.
The ceramic metal halide lamp is arranged in the luminous pill 4 in the discharge chamber 3 as in the luminous pill in the embodiment 1.
The power of the ceramic metal halide lamp was set to 400W.
Example 7
A metal halide lamp electrode constructed as hereinbefore described with reference to and as shown in figure 2, and a ceramic metal halide lamp constructed as hereinbefore described with reference to and as shown in figure 4. Wherein, the components of the transmitting ball 15 in the metal halide lamp electrode 1 are as follows: 0.1 wt% of hafnium oxide, 1 wt% of lanthanum oxide, 0.05 wt% of erbium oxide and the balance of tungsten, the average diameter of which is 0.2mm, the spacing of which is clamped between adjacent spiral tungsten filaments 131 of the tungsten filament spiral 13, and the average distance between every two adjacent launching balls 15 clamped between the same adjacent spiral tungsten filaments 131 is 0.07 mm.
The preparation method of the launching ball 15 refers to the preparation method of the launching ball 15 in the embodiment 1, wherein the ball milling process comprises the steps of ball milling at the rotating speed of 180r/min, ball-material ratio of 8: 1, ball packing coefficient of 5% and ball milling time of 40h, then molding powder, pressing into 0.2mm spherical particles, and then sintering at 1470 +/-10 ℃ for 20min in the protective atmosphere of hydrogen.
The ceramic metal halide lamp is arranged in the luminous pill 4 in the discharge chamber 3 as in the luminous pill in the embodiment 1.
The power of the ceramic metal halide lamp was set to 400W.
Example 8
A metal halide lamp electrode constructed as hereinbefore described with reference to and as shown in figure 2, and a ceramic metal halide lamp constructed as hereinbefore described with reference to and as shown in figure 4. Wherein, the components of the transmitting ball 15 in the metal halide lamp electrode 1 are as follows: 0.1 wt% of hafnium oxide, 1 wt% of lanthanum oxide, 10 wt% of erbium oxide and the balance of tungsten, the average diameter of which is 0.2mm, the spacing of which is clamped between adjacent spiral tungsten wires 131 of the tungsten wire spiral 13, and the average distance between every two adjacent launching balls 15 clamped between the same adjacent spiral tungsten wires 131 is 0.07 mm.
The preparation method of the launching ball 15 refers to the preparation method of the launching ball 15 in the embodiment 1, wherein the ball milling process comprises the steps of performing ball milling at a rotating speed of 180r/min, a ball-material ratio of 8: 1, a ball packing coefficient of 5% and ball milling time of 40h, performing die pressing on powder to form the powder, pressing the powder into spherical particles with the size of 0.2mm, and sintering the spherical particles for 20min at 1460-1480 ℃ in a hydrogen protective atmosphere.
The ceramic metal halide lamp is arranged in the luminous pill 4 in the discharge chamber 3 as in the luminous pill in the embodiment 1.
The power of the ceramic metal halide lamp was set to 400W.
Example 9
A metal halide lamp electrode and a ceramic metal halide lamp, wherein the structure of the metal halide lamp electrode and the composition of the emission sphere are the same as those of the metal halide lamp electrode of example 2.
The ceramic metal halide lamp is arranged in the luminous pill 4 in the discharge chamber 3, and the molar ratio of sodium iodide, thallium iodide and indium iodide is 0.01:6.0 × 10-4:4.0×10-5. The preparation method refers to the preparation method of the luminous pill 4 in the example 1. The diameter of the prepared luminous pill 4 is 0.3mm, and the weight of the luminous pill is 0.3 mg.
The power of the ceramic metal halide lamp was set to 150W.
Example 10
A metal halide lamp electrode and a ceramic metal halide lamp, wherein the structure of the metal halide lamp electrode and the composition of the emission sphere are the same as those of the metal halide lamp electrode of example 2.
The ceramic metal halide lamp is arranged in the luminous pill 4 in the discharge chamber 3, and the molar ratio of sodium iodide, thallium iodide and indium iodide is 0.01:7.0 × 10-4:4.7×10-5. The preparation method refers to the preparation method of the luminous pill 4 in the example 1. The diameter of the prepared luminous pill 4 is 0.8mm, and the weight of the luminous pill is 1.1 mg.
The power of the ceramic metal halide lamp was set to 150W.
Comparative example 1
A400W ceramic metal halide lamp has the electrode with the existing structure as shown in figure 1 and adopts thorium dioxide as an emitting material, and a luminous pill arranged in a discharge cavity is the luminous pill in the embodiment 1.
Ceramic metal halide lamp related performance test
The performances of the 400W ceramic metal halide lamps provided in the above examples 1 to 10 and comparative example 1, such as luminous efficiency (ratio of luminous flux to power), color rendering index, and relative color temperature, were tested by using an electric light source rapid photochromic test system. The system for testing the electric light source rapid photochromic is provided by an optical laboratory of the Compound denier university.
The specific test conditions are as follows: before each test, the system is subjected to luminous flux calibration and spectrum calibration by using a standard light source with the color temperature of 2856K. Before testing the light source, the ceramic metal halide lamp is ignited in the ball for more than 20 minutes to stabilize the ignition point of the light source.
After the metal halide lamp to be tested normally works for 200 hours, the test is carried out by using an electric light source rapid photochromic test system, the sample amount of each group of ceramic metal halide lamps is 12, wherein the number of vertical lighting lamps is 6, and the number of horizontal lighting lamps is 6. Each parameter of the light source at each test point is averaged over these valid lamp parameters.
The test results obtained according to the above test method are shown in table 1 below:
TABLE 1
As can be seen from Table 1, the thorium-free ceramic metal halide lamp provided by the embodiment of the invention has high luminous efficiency and high color temperature and relative index, such as the ceramic metal halide lamp provided by the embodiment 2 has the luminous efficiency of 73Lm/w, the color temperature of 3950K and the relative index of 84. In addition, since the thorium-free metal halide lamp electrode described above is used as the ceramic metal halide in the above embodiment, the thorium-free ceramic metal halide lamp is safe and environmentally friendly in preparation and use.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A metal halide lamp electrode comprises a tungsten electrode rod and a molybdenum sheet, wherein one end of the tungsten electrode rod is coaxially and electrically connected with the molybdenum sheet, a tungsten filament spiral is wound on the outer surface of the other end of the tungsten electrode rod, a plurality of spherical or similar spherical launching balls are clamped between adjacent spiral tungsten filaments of the tungsten filament spiral, the launching balls are alternately clamped between the adjacent spiral tungsten filaments of the tungsten filament spiral, and the distance between every two adjacent launching balls clamped between the same adjacent spiral tungsten filaments is 0.05-0.1 mm; the launching ball comprises the following components in percentage by weight:
0.05 to 0.5 percent of hafnium oxide;
0.5 to 3 percent of lanthanum oxide;
0.05 to 10 percent of erbium oxide;
the balance of tungsten is tungsten,
the preparation method of the launching ball comprises the following steps:
mixing hafnium oxide, lanthanum oxide, erbium oxide and tungsten powder according to the weight percentage, and then performing ball milling treatment in vacuum or inert gas atmosphere to obtain a mixed material;
and die pressing the mixture into spherical or similar spherical particles, placing the spherical or similar spherical particles in a reducing atmosphere, sintering at 1460-1480 ℃, and continuously cooling in the reducing atmosphere.
2. The metal halide lamp electrode of claim 1, wherein: the diameter of the launching ball is 0.1 mm-0.3 mm.
3. The metal halide lamp electrode of claim 1, wherein: in the sintering treatment step, the sintering treatment time is 20-50 min at 1460-1480 ℃.
4. The metal halide lamp electrode of claim 1, wherein: in the step of preparing the mixed material, the sizes of the hafnium oxide, the lanthanum oxide, the erbium oxide and the tungsten powder are 2-5 mu m.
5. The metal halide lamp electrode of claim 1, wherein in the step of preparing the mixed material, the ball milling process is performed under the process conditions of: tungsten balls are used as ball milling media, the ball milling rotating speed is 180 r/min-250 r/min, the ball-material ratio is (8-15) to 1, the ball filling coefficient is 5% -9%, and the ball milling time is 30 h-60 h.
6. A ceramic metal halide lamp comprises a metal halide lamp electrode, a ceramic sleeve, a ceramic discharge cavity communicated with the ceramic sleeve and luminous pills arranged in the ceramic discharge cavity, wherein the metal halide lamp electrode is the metal halide lamp electrode as claimed in any one of claims 1 to 5, one end of a tungsten electrode rod with a tungsten wire spiral wound on the surface of the metal halide lamp electrode and the tungsten wire spiral extend into the ceramic discharge cavity, and the other end of the tungsten electrode rod and a molybdenum sheet are sealed in the ceramic sleeve.
7. A ceramic metal halide lamp as claimed in claim 6, wherein: the power of the ceramic metal halide lamp is 150W-400W.
8. A ceramic metal halide lamp as claimed in claim 6 or 7, wherein: the luminous pill comprises the following components in a molar ratio of (0.005-0.015): (6.0 x 10)-4～7.0×10-4):(4.0×10-5～4.7×10-5) Sodium iodide, thallium iodide and indium iodide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310442941.6A CN104465307B (en) | 2013-09-25 | 2013-09-25 | Metal halogen lamp pole and ceramic gold-halogen lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310442941.6A CN104465307B (en) | 2013-09-25 | 2013-09-25 | Metal halogen lamp pole and ceramic gold-halogen lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104465307A CN104465307A (en) | 2015-03-25 |
| CN104465307B true CN104465307B (en) | 2018-07-27 |
Family
ID=52911186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310442941.6A Expired - Fee Related CN104465307B (en) | 2013-09-25 | 2013-09-25 | Metal halogen lamp pole and ceramic gold-halogen lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104465307B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1252891A (en) * | 1997-12-22 | 2000-05-10 | 皇家菲利浦电子有限公司 | High-pressure metal halide discharge lamp |
| CN101924010A (en) * | 2010-09-10 | 2010-12-22 | 中国原子能科学研究院 | Glowing pills for ceramic metal halide lamps |
| CN103045886A (en) * | 2012-12-27 | 2013-04-17 | 大连理工大学 | A kind of preparation method of rare earth tungsten electrode material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004063469A (en) * | 2003-08-29 | 2004-02-26 | Toho Kinzoku Co Ltd | Method for producing electrode for discharge lamp |
-
2013
- 2013-09-25 CN CN201310442941.6A patent/CN104465307B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1252891A (en) * | 1997-12-22 | 2000-05-10 | 皇家菲利浦电子有限公司 | High-pressure metal halide discharge lamp |
| CN101924010A (en) * | 2010-09-10 | 2010-12-22 | 中国原子能科学研究院 | Glowing pills for ceramic metal halide lamps |
| CN103045886A (en) * | 2012-12-27 | 2013-04-17 | 大连理工大学 | A kind of preparation method of rare earth tungsten electrode material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104465307A (en) | 2015-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5413798B2 (en) | High pressure discharge lamp | |
| CN100417738C (en) | High temperature resistant, anti electric arc corrosion composite rare earth molybdenum alloy and its preparation method | |
| CN101924010A (en) | Glowing pills for ceramic metal halide lamps | |
| CN103343275B (en) | Negative electrode material for high intensity discharge lamp and manufacturing method thereof | |
| CN104465307B (en) | Metal halogen lamp pole and ceramic gold-halogen lamp | |
| TWI437610B (en) | High pressure discharge lamp | |
| CN1868022A (en) | Lamp | |
| CN112481538A (en) | Cathode material and preparation method thereof, plasma torch cathode and preparation method thereof | |
| CN104465305A (en) | Metal halide lamp electrode and ceramic metal halide lamp | |
| CN104465310B (en) | Metal halogen lamp pole and ceramic gold-halogen lamp | |
| CN104465306A (en) | Metal halide lamp electrode and ceramic metal halide lamp | |
| CN104465309A (en) | Metal halide lamp electrode and ceramic metal halide lamp | |
| CN104465304A (en) | Metal halide lamp electrode and ceramic metal halide lamp | |
| CN104465302A (en) | Metal halide lamp electrode and ceramic metal halide lamp | |
| CN104465298A (en) | Metal halide lamp electrode and ceramic metal halide lamp | |
| CN104465300A (en) | Metal halide lamp electrode and ceramic metal halide lamp | |
| CN104465301A (en) | Metal halide lamp electrode and ceramic metal halide lamp | |
| CN104465299A (en) | Metal halide lamp electrode and ceramic metal halide lamp | |
| CN104465303A (en) | Metal halide lamp electrode and ceramic metal halide lamp | |
| CN104465308A (en) | Metal halide lamp electrode and ceramic metal halide lamp | |
| WO2003075312A1 (en) | Light-emitting case for high-voltage discharge lump and method for preparation of polycrystalline transparent alumina sintered article | |
| JP3565137B2 (en) | Method for producing discharge lamp, discharge lamp and carrier for introducing halogen | |
| JP2005285587A (en) | Cold cathode tube electrode and cold cathode tube using the electrode | |
| CN104178674A (en) | Emitting material of ceramic metal halide lamp, and manufacturing method and application thereof | |
| JP2009152171A (en) | High pressure discharge lamp and lighting fixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180727 Termination date: 20210925 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |