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EP0528427B1 - Lampe à décharge à haute pression - Google Patents

Lampe à décharge à haute pression Download PDF

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Publication number
EP0528427B1
EP0528427B1 EP92114222A EP92114222A EP0528427B1 EP 0528427 B1 EP0528427 B1 EP 0528427B1 EP 92114222 A EP92114222 A EP 92114222A EP 92114222 A EP92114222 A EP 92114222A EP 0528427 B1 EP0528427 B1 EP 0528427B1
Authority
EP
European Patent Office
Prior art keywords
discharge lamp
plug
pressure discharge
lamp according
electrical feedthrough
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 - Lifetime
Application number
EP92114222A
Other languages
German (de)
English (en)
Other versions
EP0528427A1 (fr
Inventor
Gottfried Eichelbrönner
Stefan Dr. Jüngst
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0528427A1 publication Critical patent/EP0528427A1/fr
Application granted granted Critical
Publication of EP0528427B1 publication Critical patent/EP0528427B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H01J61/366—Seals for leading-in conductors

Definitions

  • the invention is based on a high-pressure discharge lamp according to the preamble of claim 1.
  • Feedthroughs made of niobium are usually used (DE-PS 1 471 379). However, these are only of limited suitability for long lifespans and good color rendering, since the niobium tube and the melting ceramic used for sealing corrode particularly strongly in lamps with metal halide filling. An improvement is described in EP-PS 136 505. Due to the shrinking process of the "green" ceramic, the niobium tube is melted tight during final sintering without melting ceramic. This is possible because both materials have approximately the same thermal expansion coefficient (8 x 10 ⁇ 6 K ⁇ 1).
  • a bushing with a surface made of platinum, iron, nickel or cobalt which has a core made of an alloy adapted to the ceramic.
  • the bushing may be tapered and connected to the stopper using a ceramic inner support, both also tapered, by axial pressing under a certain pressure and in a certain gas atmosphere.
  • Discharge lamps are known from DE-PS 25 48 732 and 26 41 880, in which the tubular current feedthrough consists of tungsten, molybdenum or rhenium, the tube being supported by a ceramic cylinder with straight, axially aligned walls in its interior. It is made solid or hollow, in the latter case the bore serves as a pump nozzle and is subsequently closed.
  • the seal between the bushing and the ceramic parts lying inside and outside, both of which had already been sintered beforehand at a temperature of 1850 ° C is still made using a melting ceramic, so that the susceptibility to corrosion of these lamps is improved, but especially when using Metal halide fillings do not yet meet the desired requirements.
  • a corrosion-resistant melting ceramic it has so far not been possible to develop a corrosion-resistant melting ceramic.
  • the invention uses the shrinking process of a green ceramic for the sealing between the stopper and the non-adapted bushing, thereby avoiding the use of the melting ceramic, which is susceptible to corrosion.
  • an inner support in the form of an already finished sintered ceramic is used, which is no longer exposed to a shrinking process.
  • Inner support and stopper should consist of the same ceramic material. The combination of these two measures extends the life of these lamps considerably (up to a factor of four).
  • Sealing is achieved by initially leaving the end plug as a green body into which the tubular current feedthrough including the inner support is inserted. In the final sintering of the stopper, the necessary secure bond is achieved by shrinking the end stopper (approx. 2-20%). The expanding green body of the end plug presses on the pipe and presses it against the inner support body. The temperatures required for this (approx. 1850 ° C) are far from being reached at the end plug during lamp operation (approx. 1100 ° C).
  • the melting ceramic is also dispensed with in the inner support.
  • the idea here is to put the seal on the To create the inside of the current feedthrough by the pressure of the plug on the outside.
  • the inner support is in the form of a solid cylinder or a cylindrical tube (hollow cylinder). In the latter case, the central hole is used for pumping and filling purposes. You can later with a melting ceramic or the like. be closed.
  • the height of the inner support is smaller than the height of the stopper has proven particularly useful, especially if the inner support is also fastened in the tube without melting ceramic or metallot.
  • a typical value is a 30% reduction.
  • One embodiment shows particular advantages in which tapers at least part of the inner support. This shape makes it considerably easier to adapt the composite parts (plug-pipe inner support), since differences in diameter are automatically compensated for by axial displacement. The initial fit only has to be accurate to about 200 »m. In addition, the mounting of the inner support in the tube is automatically ensured before it is connected. This embodiment is particularly well suited for connection technology without melting ceramics.
  • the tube itself can already have a conical section, the angle of inclination being the same for the inner support and tube (typically 10 °).
  • the inner support typically 10 °
  • the originally circular cylindrical tube is first pressed into a conical shape. This is advantageously done by friction welding, in that the tube is pulled onto the inner support while constantly rotating it.
  • the tube can already be slightly conical (typically 5 °) and additionally expanded (to typically 10 °) during friction welding. Then this assembly is inserted into the conically shaped green body of the end plug and the end plug is sintered.
  • the invention provides a high-pressure discharge lamp with a long service life, the tightness of which is not impaired even by the use of halide-containing fillings.
  • the discharge vessel is usually tubular, either cylindrical or bulged in the middle. It is often arranged in a one- or two-sided outer bulb.
  • a metal halide discharge lamp with an output of 150 W is shown schematically in FIG. It consists of a cylindrical outer bulb 1 made of tempered glass, which defines a lamp axis and is squeezed (2) and rocked (3) on two sides.
  • the axially arranged discharge vessel 8 made of Al2O3 ceramic is bulged in the middle 4 and has cylindrical ends 9. It is held in the outer bulb 1 by means of two power supply lines 6, which are connected to the base parts 3 via foils 5.
  • the power supply lines 6 are welded to tubular bushings 10, which are each fitted in a stopper 11 at the end of the discharge vessel.
  • the two bushings 10 made of molybdenum (or also tungsten, possibly alloyed with rhenium) each hold electrodes 12 on the discharge side, consisting of an electrode shaft 13 and a coil 14 pushed on at the discharge end.
  • the filling of the discharge vessel consists of an inert ignition gas, e.g. Argon, from mercury and additives to metal halides.
  • the melting area at one end of the discharge vessel 8 is shown in detail in FIG.
  • the discharge vessel 8 has a wall thickness of 1.2 mm at its two ends 9.
  • a cylindrical stopper 11 made of Al2O3 ceramic is inserted into the end 9 of the discharge vessel. Its outer diameter is 3.3 mm with a height of 5 mm.
  • a bushing a molybdenum tube 10 with a length of 12 mm, a wall thickness of 0.1 mm and a constant diameter of 1.4 mm fitted, which is closed at the discharge end 15.
  • the shaft 13 is welded onto the end 15.
  • the tube 10 projects beyond the plug 11 on both sides.
  • a ceramic inner support 16 made of Al2O3 is arranged at the level of the plug. It is a solid cylinder, the outer diameter of which is closely matched to the inner diameter of the tube 10 (to approximately 15 »m) and which is connected to the tube by a metal layer 17 located therebetween. In contrast, there is no additional compound between tube 10 and plug 11.
  • the plug 11 is sintered directly onto the tube 10.
  • the stopper 11 is also sintered onto the tube 18, which is sealed gas-tight on the discharge side in that the electrode shaft 13 is welded into the open end of the tube 18.
  • the inner support 19, which has approximately the height of the plug, is tightly fitted into the tube 18 - the tolerance is approximately 50 »m - and thereby forms a counterpart in the shrinking process of the plug 11, which provides a solid gas-tight contact between the tube 18 and the inner support 19 ensures.
  • a stop for the inner support can be used. It can be in the In the simplest case, it is an annular spring part made of high-melting material that is spread into the cylindrical tube. As shown in FIG. 3, an extension 25 of the inner support serving as a spacer, which rests on the shaft 13 of the electrode, is particularly suitable.
  • the tightness is further improved in that the inner support 20, which is designed here as a hollow cylinder, has a reduced height of 3.5 mm in comparison to the stopper 11 and in the tube 18 in the middle with respect to the height the plug is arranged.
  • indentations 21 form, which extend from the end edges 22 of the inner support to the height of the end faces 23 of the plug. The reason is that the resistance of the inner support when the plug ceramic shrinks is missing in these sections.
  • the indentations 21 are exaggerated because in reality they are barely visible to the naked eye.
  • the fit of the stopper and the tightness of the bushing 18 on both its outside and inside are additionally improved.
  • the hollow cylinder 20 can be used in this version as a pump nozzle if the tube 18 is equipped with an opening 18 '. After evacuation and filling, the hollow cylinder 20 is closed by a suitable melting ceramic 24 in a manner known per se.
  • FIGS. 5 and 6 Another option, especially at an inner support which is shortened in comparison to the plug can be used is shown in FIGS. 5 and 6.
  • the stop is formed by a conical central section 26 or 27 of the tube 28 or 29, against which a corresponding conical end section 30 or 31 of the inner support 32 or 33 abuts. It does not matter whether the conical section is arranged on the side of the bushing facing the discharge (FIG. 5) or the side facing away (FIG. 6). In both cases, the plug 11 is also provided with corresponding bevels 34, 35.
  • the inner support 33 can be offset relative to the stopper on the side remote from the discharge or even protrude on the end face of the stopper.
  • the inner support can be fastened using both of the techniques previously shown (FIGS. 2 and 3).
  • FIGS. 7 to 9 Embodiments with special advantages are shown in FIGS. 7 to 9.
  • a completely conical inner support is inserted in the conical central sections 27 of the tube 29, offset to the side remote from the discharge.
  • the inner support can again be solid (Fig. 7) as a truncated cone 36 or tubular with conical inner walls (36 'in Fig. 8) or straight inner walls (36 ⁇ in Fig. 9). With this arrangement, the advantages of a stop can be ideally combined with the reduced requirement for the tolerances to be observed.
  • FIG. 9 meets extremely high requirements for tightness and thus a long service life. It essentially corresponds to that Examples of FIGS. 7 and 8, but here is a particularly secure connection between the molybdenum tube 29 and the conical inner support 36bid by friction welding.
  • a connecting layer 37 a few atomic layers thick (drawn in excessively strongly in FIG. 9 for clarity) is formed between the molybdenum tube and the inner support.
  • the angle of inclination of the cone is less than 10 ° here in order to keep the mechanical deformation of the originally straight molybdenum tube 29 as low as possible.
  • the bevels 35 of the plug have the same inclination.
  • the end section 38 of the tube with an enlarged diameter starts directly at the base end 39 of the inner support, in accordance with the method of manufacture.
  • the friction welding technique can also be applied to the partially conical embodiments.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Claims (11)

  1. Lampe à décharge haute pression comportant une enceinte céramique de décharge (8), qui contient un remplissage pouvant être ionisé et possède deux extrémités, qui sont fermées respectivement par une pièce moulée céramique formant bouchon (11) et dans laquelle est disposée une traversée tubulaire (10;18;28;29) pour l'alimentation en courant en un métal, dont le coefficient de dilatation thermique est inférieur à celui de la céramique, caractérisée par le fait que le corps de base du bouchon (11) est fritté directement, d'une manière étanche aux gaz, sur la traversée (10;18;28;29) pour le courant, une seconde pièce moulée céramique servant d'appui intérieur (16;19;20;32; 33;36) étant disposée en supplément à l'intérieur de la traversée pour le courant, à peu près au niveau du bouchon.
  2. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que l'appui intérieur (19;20;21;32) est relié à la traversée (18;28;29) pour le courant, uniquement au moyen de la pression du bouchon (11) fixé directement par frittage.
  3. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que la traversée (10) pour le courant est fermée (4) du côté décharge et que l'appui intérieur (7) est relié à la traversée (10) pour le courant au moyen d'une céramique fusible (17) ou d'une soudure métallique.
  4. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que l'appui intérieur est réalisé sous la forme d'un cylindre plein (19) ou d'un cylindre creux (20).
  5. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que la hauteur de l'appui intérieur (20) est inférieure à la hauteur du bouchon (11) .
  6. Lampe à décharge à haute pression suivant la revendication 5, caractérisée par le fait que l'appui intérieur (20) est disposé dans la traversée (18) pour le courant, à mi-hauteur du bouchon dans cette traversée.
  7. Lampe à décharge à haute pression suivant la revendication 4, caractérisée par le fait qu'au moins la paroi extérieure de l'appui intérieur possède une section conique (30;31;36;36′;36˝), qui se rétrécit en direction de l'espace de décharge et qui coopère avec des sections coniques (26;27) présentes sur la traversée pour le courant et sur le bouchon.
  8. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que la traversée pour le courant est en molybdène, en tungstène ou en rhénium ou en un alliage de ces métaux.
  9. Lampe à décharge à haute pression suivant la revendication 1, caractérisée par le fait que le remplissage contient un composé halogéné.
  10. Lampe à décharge à haute pression suivant la revendication 7, caractérisée par le fait que l'appui intérieur (33;36;36′;36˝) est décalé, par rapport au bouchon (11), en direction du côté tourné à l'opposé de la chambre de décharge.
  11. Lampe à décharge à haute pression suivant la revendication 7, caractérisée par le fait que la traversée pour le courant est reliée au support intérieur au moyen d'une couche (37) formée par soudage à friction.
EP92114222A 1991-08-20 1992-08-20 Lampe à décharge à haute pression Expired - Lifetime EP0528427B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4127555 1991-08-20
DE4127555A DE4127555A1 (de) 1991-08-20 1991-08-20 Hochdruckentladungslampe

Publications (2)

Publication Number Publication Date
EP0528427A1 EP0528427A1 (fr) 1993-02-24
EP0528427B1 true EP0528427B1 (fr) 1995-05-31

Family

ID=6438698

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92114222A Expired - Lifetime EP0528427B1 (fr) 1991-08-20 1992-08-20 Lampe à décharge à haute pression

Country Status (5)

Country Link
US (1) US5404077A (fr)
EP (1) EP0528427B1 (fr)
JP (1) JPH05205701A (fr)
CN (1) CN1071534A (fr)
DE (2) DE4127555A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8093815B2 (en) 2006-12-18 2012-01-10 Koninklijke Philips Electronics N.V. High-pressure discharge lamp having a ceramic discharge vessel directly sealed to a rod

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9206727U1 (de) * 1992-05-18 1992-07-16 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Hochdruckentladungslampe
DE9207816U1 (de) * 1992-06-10 1992-08-20 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Hochdruckentladungslampe
TW347547B (en) 1994-05-17 1998-12-11 Toshiba Light Technic Kk Discharge lamp and illumination apparatus using the same
CN1094648C (zh) * 1995-03-09 2002-11-20 皇家菲利浦电子有限公司 高压放电灯
KR100480523B1 (ko) * 1996-06-12 2005-07-18 코닌클리케 필립스 일렉트로닉스 엔.브이. 전기램프
JP3419275B2 (ja) * 1997-09-30 2003-06-23 ウシオ電機株式会社 放電ランプのシール方法
JP3686286B2 (ja) * 1999-06-25 2005-08-24 株式会社小糸製作所 アークチューブおよびその製造方法
DE19933154B4 (de) * 1999-07-20 2006-03-23 W.C. Heraeus Gmbh Entladungslampe
DE19957561A1 (de) * 1999-11-30 2001-05-31 Philips Corp Intellectual Pty Hochdruckgasentladungslampe
US6759806B2 (en) * 2000-03-13 2004-07-06 Nec Microwave Tube, Ltd. High pressure discharge lamp and method for sealing a bulb thereof
DE10026802A1 (de) * 2000-05-31 2002-01-03 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metallhalogenidlampe mit keramischem Entladungsgefäß
US6642654B2 (en) * 2000-07-03 2003-11-04 Ngk Insulators, Ltd. Joined body and a high pressure discharge lamp
US6812642B1 (en) 2000-07-03 2004-11-02 Ngk Insulators, Ltd. Joined body and a high-pressure discharge lamp
US6528945B2 (en) 2001-02-02 2003-03-04 Matsushita Research And Development Laboratories Inc Seal for ceramic metal halide discharge lamp
US6856091B2 (en) * 2002-06-24 2005-02-15 Matsushita Electric Industrial Co., Ltd. Seal for ceramic metal halide discharge lamp chamber
EP1568066B1 (fr) * 2002-11-25 2010-02-24 Philips Intellectual Property & Standards GmbH Lampe à décharge haute pression et son procédé de fabrication
KR100966078B1 (ko) * 2002-11-25 2010-06-28 코닌클리케 필립스 일렉트로닉스 엔.브이. 단부 마감 부재, 방전 램프 및 상기 방전 램프를 제조하는 방법
EP1576646A2 (fr) * 2002-11-25 2005-09-21 Philips Intellectual Property & Standards GmbH Enceinte de decharge a revetement en ceramique presentant une etancheite aux gaz amelioree
US7839089B2 (en) * 2002-12-18 2010-11-23 General Electric Company Hermetical lamp sealing techniques and lamp having uniquely sealed components
US7215081B2 (en) * 2002-12-18 2007-05-08 General Electric Company HID lamp having material free dosing tube seal
DE102004015467B4 (de) * 2004-03-26 2007-12-27 W.C. Heraeus Gmbh Elektrodensystem mit einer Stromdurchführung durch ein Keramikbauteil
US7521870B2 (en) * 2004-06-08 2009-04-21 Ngk Insulators, Ltd. Luminous containers and those for high pressure discharge lamps
US7288303B2 (en) * 2004-06-08 2007-10-30 Ngk Insulators, Ltd. Structures of brittle materials and metals
JP4953242B2 (ja) * 2004-06-08 2012-06-13 日本碍子株式会社 発光容器およびその組み立て体
CN100537483C (zh) * 2004-06-08 2009-09-09 日本碍子株式会社 脆性材料-金属结构体
US20100026181A1 (en) * 2008-08-01 2010-02-04 Osram Sylvania Inc. Ceramic discharge vessel and method of making same
DE102009048432A1 (de) * 2009-10-06 2011-04-07 Osram Gesellschaft mit beschränkter Haftung Gasentladungslampe
CN102110562A (zh) * 2011-02-15 2011-06-29 苏州名阳真空电器有限公司 高压放电管
CN105478943A (zh) * 2016-01-07 2016-04-13 深圳市金联富电子科技有限公司 一种用于电容器引线的焊接工艺

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NL153508B (nl) * 1966-11-30 1977-06-15 Philips Nv Werkwijze voor het vacuuemdicht verbinden van een keramisch voorwerp met een metalen voorwerp en elektrische ontladingsbuis voorzien van een stroomtoevoergeleider verkregen volgens die werkwijze.
NL174682C (nl) * 1974-11-14 1985-01-16 Philips Nv Elektrische ontladingslamp.
NL174103C (nl) * 1975-09-29 1984-04-16 Philips Nv Elektrische ontladingslamp.
US4545799A (en) * 1983-09-06 1985-10-08 Gte Laboratories Incorporated Method of making direct seal between niobium and ceramics
NL8503117A (nl) * 1985-11-13 1987-06-01 Philips Nv Hogedrukontladingslamp.
JPH0682545B2 (ja) * 1986-12-24 1994-10-19 日本碍子株式会社 高圧金属蒸気放電灯用発光管

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8093815B2 (en) 2006-12-18 2012-01-10 Koninklijke Philips Electronics N.V. High-pressure discharge lamp having a ceramic discharge vessel directly sealed to a rod

Also Published As

Publication number Publication date
US5404077A (en) 1995-04-04
CN1071534A (zh) 1993-04-28
EP0528427A1 (fr) 1993-02-24
JPH05205701A (ja) 1993-08-13
DE59202389D1 (de) 1995-07-06
DE4127555A1 (de) 1993-02-25

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