EP0917179A2 - Elektrodenbauteil für Entladungslampen - Google Patents
Elektrodenbauteil für Entladungslampen Download PDFInfo
- Publication number
- EP0917179A2 EP0917179A2 EP98117203A EP98117203A EP0917179A2 EP 0917179 A2 EP0917179 A2 EP 0917179A2 EP 98117203 A EP98117203 A EP 98117203A EP 98117203 A EP98117203 A EP 98117203A EP 0917179 A2 EP0917179 A2 EP 0917179A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrode component
- electrode
- component according
- insert
- injection molding
- 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.)
- Withdrawn
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 31
- 239000002184 metal Substances 0.000 claims abstract description 31
- 238000001746 injection moulding Methods 0.000 claims abstract description 25
- 239000000843 powder Substances 0.000 claims abstract description 23
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 21
- 239000010937 tungsten Substances 0.000 claims abstract description 19
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 11
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000011733 molybdenum Substances 0.000 claims abstract description 9
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 6
- 239000000956 alloy Substances 0.000 claims abstract description 6
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 6
- 229910052702 rhenium Inorganic materials 0.000 claims abstract description 5
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims abstract description 4
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 8
- 150000001247 metal acetylides Chemical class 0.000 claims description 3
- 239000003870 refractory metal Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 238000005476 soldering Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 4
- 239000007772 electrode material Substances 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 238000004663 powder metallurgy Methods 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- 229910052724 xenon Inorganic materials 0.000 description 4
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 4
- 206010038743 Restlessness Diseases 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 229910052753 mercury Inorganic materials 0.000 description 3
- 229910001507 metal halide Inorganic materials 0.000 description 3
- 150000005309 metal halides Chemical class 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 238000007514 turning Methods 0.000 description 3
- 229910052776 Thorium Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 229910052746 lanthanum Inorganic materials 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- NFFIWVVINABMKP-UHFFFAOYSA-N methylidynetantalum Chemical compound [Ta]#C NFFIWVVINABMKP-UHFFFAOYSA-N 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 229910003468 tantalcarbide Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 208000034656 Contusions Diseases 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 208000001431 Psychomotor Agitation Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052768 actinide Inorganic materials 0.000 description 1
- 150000001255 actinides Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- -1 borides Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 description 1
- 229910003452 thorium oxide Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 150000003657 tungsten Chemical class 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
-
- 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
Definitions
- the invention is based on an electrode component for discharge lamps according to the preamble of claim 1. It can be particularly are electrodes for high-pressure discharge lamps, such as, for example can be used for photo-optical purposes. On the other hand, can the invention but also for individual parts of electrodes or for Frame parts holding electrodes, for example shaft parts for electrodes, be used. These parts are in the following under the term components summarized for electrodes.
- Electrodes and components for electrodes are usually used in lamp construction made of a high-melting metal such as tungsten or molybdenum or also made tantalum.
- the electrode is almost always solid, i.e. she is manufactured by powder metallurgy and using rolling, hammering and drawing processes been deformed. The application of a sintered body could not the high costs so far not enforce.
- a disadvantage of solid electrodes is that complicated electrode shapes, such as would be necessary for optimal heat design, not with these known electrode structures or only with a lot of machining Effort and therefore with high additional consumption (up to more than 50% Waste) can be produced.
- Electrode materials are also composed of two components for certain purposes. They are often referred to as combination or insert electrodes. From scripture Electrode materials based on refractory metals ", ed. VEB Narva, Berlin, 1976, pp. 183 to 189, electrodes are already known which consist of two components. Anodes are shown in FIG. 55a and in FIG. 56c, d Cathodes, each described for xenon short-arc lamps These electrodes consist of a conventional sintered body (radiator) made of tungsten, which serves as a heat household body A power supply in the form of a tungsten pin is sintered into a bore in the radiator by means of a helix.
- radiator sintered body
- Such electrodes are rarely used because the elaborate processing of the heat household body, namely the manufacture a receptacle for inserting an insert, uneconomical and is difficult.
- electrodes with an emitter additive are necessary.
- an emitter additive mostly oxides of thorium, alkaline earth metals or rare earth metals, in particular of lanthanum
- the known manufacturing processes described above each require a very high degree of mechanical processing.
- that for processing becomes necessary property of deformability limited. Therefore was So far it has not been desired to set the emitter content relatively high (approx. 3-5%). Instead, you had to deal with complicated constructions help to still achieve a high emitter content. For example is the use of a slid on the electrode Helix known, being in the cavities between the individual turns an emitter-containing paste is introduced into the coil.
- a complicated shape should be possible become.
- the structural stability of the electrode in the thermal highly stressed area at the tip of the electrode can be improved.
- There is also an improvement in bow restlessness and an extension of the lifespan is desired.
- the electrode components are made by a metal powder injection molding process manufactured.
- This technique better known as the English Acronym MIM (Metal Injection Molding) has long been known per se. However, it has never been used in lamp construction.
- the metal powder injection molding process (see, for example, US Pat. No. 4,765,950 and US Pat. No. 4,113,480) combines the freedom of shaping in the known plastic injection molding with the wide range of materials available in powder metallurgy. It enables the direct production of very complex shaped components in near-net shape production ( near net shaping ”) while avoiding machining post-processing. Furthermore, the manufacturing process can now be automated.
- a suitable one Metal powder is mixed with so much plastic (the so-called binder) that this mixture, which is in the form of granules, the flow properties of the plastic accepts and processed further in the same way as for plastic injection molding can by placing in an injection mold with the contour of the desired future component is introduced. Then a metallic component obtained, the green body is removed from the injection mold; the binder is then removed from the so-called by heat or by solvent. Green body removed. This process is known as dewaxing. Then the component is made according to classic powder metallurgy to a component of very high density (at least 90% by volume, preferred 95% and more) sintered. The residual porosity of at most 10% or 5% should preferably be present as closed pores.
- the sintering activity of the metal powder used must be sufficient be high to achieve a high sintering density. Therefore be very fine Metal powder with small average grain sizes (less than 20 ⁇ m, preferably less than 2 ⁇ m) is used.
- Electrode components for discharge lamps according to the invention are made of high temperature resistant metal. It is particularly suitable Tungsten, molybdenum, tantalum, rhenium or alloys thereof, but also carbides of these metals, especially tantalum carbide (TaC).
- TaC tantalum carbide
- the electrodes were made from blanks with appropriate Dimensions produced by turning, grinding, drilling, etc. Possibly is achieved through suitable manufacturing processes such as rollers and hammers additional deformation work introduced to ensure structural stability to increase the electrode materials.
- the doping is preferably carried out to stabilize the structure with elements such as K, Al and Si and additionally with oxides, Carbides, borides, nitrides and / or the pure metals (or their alloys) of rare earth elements, the lanthanoids, the actinoids, e.g. La, Ce, Pr, Nd, Eu, Th, but also Sc, Ti, Y, Zr, Hf. They are not only used for Structural stabilization, but also to lower the electron work function.
- metal powder injection molding processes are used one-piece electrodes, in particular made of Tungsten, manufactured, the injection mold have complex contours can. It can be high density bodies with typically 98% (even up to more than 99%) of the theoretical density, which is already shaped close to the final shape are. This is in particular an optimization of the heat flow behavior of electrodes possible, in particular by the electrode being suitably shaped Constrictions (punctures) and grooves or similar having. So far, has had for such Electrodes a drop of up to about 60% can be accepted. The use of the metal powder injection molding process, however, allows the Limit waste to a few percent. In addition, can now be optimized Shapes can be realized that were previously impossible to produce.
- individual electrode components that were produced by means of metal powder injection molding.
- electrode frame parts for holding electrodes for example electrode shafts, especially made of molybdenum or tungsten.
- the electrode component according to the invention intended for an insert electrode.
- the insert electrodes consist of several (usually two) components.
- an insert as the electrode tip (Insert).
- the radiator consists in particular of tungsten. He owns his a side (cavity) for the insert on the side facing the discharge.
- the emitter content for example is about 0.2 to 5 wt .-%.
- the radiator can also be used in this Embodiment an optimized shape with regard to the heat flow behavior (similar to the first embodiment).
- the advantage of the solderless connection is, among other things, that in the discharge volume contained filling is not contaminated.
- the as a molded sintered body executed radiator shrinks onto the insert or onto the shaft.
- the insert is often used to reduce sheet unrest with an emitter (mostly radioactive thorium oxide is used) in small quantities (see above). Very little waste is produced during the production of the insert is radioactive, in contrast to the one used almost exclusively up to now one-piece compact electrode.
- the insert can now have one compared to known compact electrodes have a significantly smaller diameter. This makes it possible to have a far greater influence on his structure than so far. It is now even possible to almost match the theoretical density of the electrode material to achieve. This leads to a stabilization of the structure, in particular for dimensional stability even at high temperatures.
- the electrode tip can thus be subjected to higher thermal loads, which is higher Current load (current carrying capacity) corresponds to (up to 15%) or one longer lifespan with very little bow unrest.
- the radiator can consist of the same material as the insert, but is advantageous here the undoped, pure metal used, preferably W, Ta, Mo or Re as well their alloys.
- the radiator unlike the insert, is not in the thermal Main stress zone is located due to the use of MIM technology a density of at least 90% of the theoretical density. Prefers the density is over 95%, corresponding to a residual porosity of ⁇ 5%. An important property of such a high density body is that its pores are closed and not interconnected. You point so no connection to the surface.
- Rotational symmetry can be deviated by using an appropriate injection mold is used.
- An example is an elliptical shape of the radiator. This carries the radiation characteristic in an asymmetrical (Elliptical) discharge vessel bill, as used for example is to take into account the sheet lift in the horizontal burning position.
- the fixation of the insert and the power supply (electrode shaft) on Radiator can preferably do so without additional help when sharing Final sintering of all components is done by shrinking. This eliminates Joining techniques such as welding and soldering, the corresponding Need welding and soldering aids. Because because the radiator uses the metal injection molding process is manufactured, insert and power supply overmolded directly with the granules of the radiator. So it is already done a fixation before sintering. In the event that insert and electrode shaft made of the same material, they can even be used continuously be inserted as one piece into the injection mold of the radiator, which gives the electrode particular stability. This is possible with lamps whose insert does not require an emitter.
- Figure 1 is a frame part 1 for holding a conventional cylindrical Electrode 4 (indicated by dashed lines), for example for a high-pressure mercury lamp, shown. It consists of a rod-shaped shaft 2, the distal end of the discharge in one piece an annular component 3 (so-called. Plate) is attached. Lamps with such a structure are for example in EP 479,089 (corresponding to US Pat. No. 5,304,892).
- the Frame part 1 is a structural unit made of tungsten or molybdenum according to the metal powder injection molding process manufactured. So far, this part of the frame had to two massive individual parts are assembled and then expensive to be soldered with platinum. There is a risk of breaking the Interface. As an alternative, there was previously only the complex turning from one massive blank, in which a lot of waste is accepted had to.
- FIG. 2 shows a one-piece electrode 5 for a highly loaded high-pressure discharge lamp shown. It consists of a cylindrical base body 9 and a conical stump 8 attached on the discharge side. For optimization of the heat flow, the base body 9 has a series of rotating Grooves 6, which ensure that the temperature on the shaft 7 relative is low.
- Such electrodes can now be used for xenon short arc lamps, High pressure mercury lamps, metal halide lamps and high pressure sodium lamps tailor-made. The shape optimized for the heat flow The electrode can be tailored to the needs by using the MIM technology of the respective lamp type.
- An insert electrode 10 is shown in FIG. It consists of a radiator 11 made of tungsten using the MIM technique, with a cavity on the side facing the discharge, into which a solid insert 12 is inserted without soldering.
- the insert 12 consists of tungsten with a proportion of 2% by weight of ThO 2 .
- the radiator 11 has circumferential grooves 13a on the side facing away from the discharge and a circumferential groove 13b in the front area.
- the insert electrode 10 has the following dimensions: the outer diameter is 10 mm, the length is 18 mm.
- FIG. 4 shows an anode 14 for xenon short-arc lamps.
- she consists from a radiator 15, which as a MIM component, that is to say according to the metal powder injection molding process, is produced and in the form of a cylindrical tungsten body is designed with a discharge-side tip. In the area of the top it has a cavity 16 into which an emitter-containing insert 17 is inserted without soldering is. On its side 18 remote from the discharge, it has a bore 19, in an electrode shaft 20 made of solid tungsten is used.
- the anode 14 has the following dimensions: the outer diameter is 20 mm, the length is 35 mm.
- FIG. 5 shows a two-part cathode 25 for a xenon short arc lamp.
- a radiator 26 made using metal powder injection molding Made of doped, emitter-containing tungsten, is tapered at the front to. It has a through bore 27 into which a shaft 28 is inserted without soldering is.
- An insert 29 projects from the radiator 26 on the discharge side. Insert 29 and shaft 28 are made of one piece throughout (solid undoped Tungsten). This one-piece component is used in the injection mold the radiator is inserted before the granules are injected for the radiator becomes. In this way, this cathode comes without any fasteners (Plumb or spiral).
- the cathode 25 has the following dimensions: the outer diameter is 2.5 mm, the length is 3 mm.
- FIG. 6 shows an example of use of a metal halide lamp 32 with a Power of 150 W. It consists of a quartz glass vessel 33, which is a metal halide filling contains. There are external power supplies at both ends 34 and molybdenum foils 35 embedded in bruises 36. On The molybdenum foils 35 are the shafts 37 of cylindrical, by means of metal powder injection molding produced electrodes 38 attached. The latter protrude into the discharge vessel 32. The two ends of the discharge vessel are each with a heat reflective coating 40 made of zirconium oxide Mistake.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Discharge Lamp (AREA)
Abstract
Description
- Figur 1
- ein Elektrodengestellteil für eine Quecksilberhochdrucklampe;
- Figur 2
- eine Elektrode mit optimiertem Wärmeflußverhalten für eine hochbelastete Hochdruckentladungslampe;
- Figur 3
- eine Insert-Elektrode;
- Figur 4
- eine Anode, die als Insert-Elektrode ausgeführt ist;
- Figur 5
- eine Kathode, die als Insert-Elektrode ausgeführt ist
- Figur 6
- eine Lampe mit einer erfindungsgemäßen Elektrode.
Claims (12)
- Elektrodenbauteil für Entladungslampen, gefertigt aus hochtemperaturbeständigem Metall, insbesondere aus Wolfram, Molybdän, Tantal, Rhenium oder Legierungen sowie auch Carbiden dieser Materialien, dadurch gekennzeichnet, daß das Elektrodenbauteil nach dem Metallpulverspritzgußverfahren hergestellt ist.
- Elektrodenbauteil nach Anspruch 1, dadurch gekennzeichnet, daß die mittlere Korngröße des Pulvers unter 20 µm, bevorzugt unter 2 µm, liegt.
- Elektrodenbauteil nach Anspruch 1, dadurch gekennzeichnet, daß die Dichte des Elektrodenbauteils mindestens 90% der theoretischen Dichte, bevorzugt mindestens 95% der theoretischen Dichte, beträgt.
- Elektrodenbauteil nach Anspruch 3, dadurch gekennzeichnet, daß die Restporosität geschlossen ist.
- Elektrodenbauteil nach Anspruch 1, dadurch gekennzeichnet, daß das Elektrodenbauteil ein Elektrodengestellteil (1), insbesondere aus Molybdän oder Wolfram, ist.
- Elektrodenbauteil nach Anspruch 1, dadurch gekennzeichnet, daß das Elektrodenbauteil eine Elektrode (5), insbesondere aus Wolfram, ist, die einstückig ist und so geformt ist, daß ihr Wärmeflußverhalten optimiert ist.
- Elektrodenbauteil nach Anspruch 6, dadurch gekennzeichnet, daß die Elektrode (5) umlaufende Rillen (13a) und/oder Einstiche (13b) aufweist.
- Elektrodenbauteil nach Anspruch 1, dadurch gekennzeichnet, daß das Elektrodenbauteil ein Radiator (11), insbesondere aus Wolfram, ist, der an der der Entladung zugewandten Seite eine Höhlung besitzt, in die ein Insert (12) eingesetzt ist.
- Elektrodenbauteil nach Anspruch 1, dadurch gekennzeichnet, daß das Elektrodenbauteil eine mehrteilige Elektrode (14;15) ist, bei der mindestens eines der Einzelteile gemäß Metallpulverspritzgußverfahren hergestellt sind.
- Elektrodenbauteil nach Anspruch 9, dadurch gekennzeichnet, daß das mittels Metallpulverspritzgußverfahren hergestellte Einzelteil mit mindestens einem der anderen Teile lötfrei verbunden ist.
- Elektrodenbauteil nach Anspruch 9, dadurch gekennzeichnet, daß das mittels Metallpulverspritzgußverfahren hergestellte Einzelteil (26) einen Schaft (28) und ein Insert (29) umgibt, wobei Schaft und Insert aus einem einzigen Teil bestehen.
- Lampe (32) mit einem Elektrodenbauteil nach einem der vorhergehenden Ansprüche.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19749908 | 1997-11-11 | ||
DE19749908A DE19749908A1 (de) | 1997-11-11 | 1997-11-11 | Elektrodenbauteil für Entladungslampen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0917179A2 true EP0917179A2 (de) | 1999-05-19 |
EP0917179A3 EP0917179A3 (de) | 1999-05-26 |
Family
ID=7848357
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98117203A Withdrawn EP0917179A3 (de) | 1997-11-11 | 1998-09-09 | Elektrodenbauteil für Entladungslampen |
Country Status (6)
Country | Link |
---|---|
US (1) | US6211615B1 (de) |
EP (1) | EP0917179A3 (de) |
JP (1) | JPH11219683A (de) |
CA (1) | CA2247221A1 (de) |
DE (1) | DE19749908A1 (de) |
HU (1) | HUP9802612A3 (de) |
Cited By (3)
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EP1047109A1 (de) * | 1999-04-21 | 2000-10-25 | Ushiodenki Kabushiki Kaisha | Kurzbogen-Entladungslampe |
CN106881463A (zh) * | 2015-12-21 | 2017-06-23 | 成都虹波实业股份有限公司 | 一种筒状或杯状钨钼制品的制造方法 |
AT17391U1 (de) * | 2020-07-31 | 2022-03-15 | Plansee Se | Hochtemperaturkomponente |
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2005108435A (ja) * | 1999-06-30 | 2005-04-21 | Hamamatsu Photonics Kk | フラッシュランプ |
DE20005764U1 (de) | 2000-03-30 | 2000-06-08 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 81543 München | Kurzbogenlampe |
JP4512968B2 (ja) | 2000-08-03 | 2010-07-28 | ウシオ電機株式会社 | ショートアーク型高圧放電ランプ |
DE10048187A1 (de) * | 2000-09-28 | 2002-04-11 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Entladungslampe für dielektrisch behinderte Entladungen mit Stützelementen zwischen einer Bodenplatte und einer Deckenplatte |
EP1405331A1 (de) * | 2001-06-25 | 2004-04-07 | Koninklijke Philips Electronics N.V. | Hochdruckgasentladungslampe und verfahren zur deren herstellung |
DE10204925A1 (de) * | 2002-02-07 | 2003-08-21 | Philips Intellectual Property | Quecksilberfreie Hochdruckgasentladungslampe |
CN101292324B (zh) * | 2003-05-26 | 2012-11-14 | 皇家飞利浦电子股份有限公司 | 具有改进的颜色稳定性的无钍电极 |
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EP1047109A1 (de) * | 1999-04-21 | 2000-10-25 | Ushiodenki Kabushiki Kaisha | Kurzbogen-Entladungslampe |
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Also Published As
Publication number | Publication date |
---|---|
CA2247221A1 (en) | 1999-05-11 |
DE19749908A1 (de) | 1999-05-12 |
HUP9802612A3 (en) | 2001-03-28 |
HU9802612D0 (en) | 1998-12-28 |
US6211615B1 (en) | 2001-04-03 |
JPH11219683A (ja) | 1999-08-10 |
HUP9802612A2 (hu) | 1999-07-28 |
EP0917179A3 (de) | 1999-05-26 |
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