EP1958238B1 - Lampe aux halogenures metalliques - Google Patents

Lampe aux halogenures metalliques Download PDF

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Publication number
EP1958238B1
EP1958238B1 EP06819826A EP06819826A EP1958238B1 EP 1958238 B1 EP1958238 B1 EP 1958238B1 EP 06819826 A EP06819826 A EP 06819826A EP 06819826 A EP06819826 A EP 06819826A EP 1958238 B1 EP1958238 B1 EP 1958238B1
Authority
EP
European Patent Office
Prior art keywords
mov
metal halide
halide lamp
leadthrough
pca
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.)
Not-in-force
Application number
EP06819826A
Other languages
German (de)
English (en)
Other versions
EP1958238A2 (fr
Inventor
Roland Hüttinger
Stefan Jüngst
Khanh Pham Gia
Steffen Walter
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
Osram GmbH
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 Osram GmbH filed Critical Osram GmbH
Publication of EP1958238A2 publication Critical patent/EP1958238A2/fr
Application granted granted Critical
Publication of EP1958238B1 publication Critical patent/EP1958238B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/32—Seals for leading-in conductors
    • H01J5/34—Seals for leading-in conductors for an individual conductor
    • H01J5/36—Seals for leading-in conductors for an individual conductor using intermediate part

Definitions

  • the invention relates to a metal halide lamp according to the preamble of claim 1. These are lamps with a ceramic discharge vessel, which find particular application in general lighting.
  • the bushing is a pin whose inner part is made of molybdenum.
  • the layer also has the additional purpose of being particularly resistant to halogens of the filling.
  • EP 0 052 844 A1 discloses a high pressure sodium discharge lamp with a feed made of a MoV alloy sealed by a frit in a PCA part.
  • a tube is used as the feedthrough, since it has more elastic properties than a pin.
  • the implementation has a MoV part, wherein the implementation may also have other parts, such as a niobium part as the outer part or a core of another material.
  • the MoV part is treated by means of an alitation process. Subsequently, this system is inserted directly into the open end of a PCA green body.
  • the PCA part is either a plug or the direct end of a discharge vessel of transparent Al 2 O 3 or similar. if necessary, it can also be a cermet part of the components Mo and Al 2 O 3 .
  • glass solder or ceramic is now dispensed with at this point.
  • a better adhesion of the implementation of the PCA part, in particular the end of the ceramic discharge vessel, is -ggf. waiving a cermet plug by a special adhesive layer, which is based on the activation of the surface of the implementation achieved.
  • aluminum is transferred to the surface of the molybdenum-vanadium alloy, in particular via the gas phase.
  • a high Al-containing layer is formed, hereinafter referred to simply as (MoV) 3Al8 layer. This happens in a diffusion process that is temperature- and time-dependent.
  • MoV tubes are placed in an Al-containing powder bed mixture and annealed at temperatures between 800 and 1200 ° C in a protective gas atmosphere.
  • a gradient structure of an Al-rich AlxMoyVz phase is formed on the outside, similar to an A18Mo3 phase, which is followed by Almeric phases AlwMoyVz phase, similar to Mo3Al, which further into the MoV. Structure of the tube passes.
  • the index w is significantly smaller than x.
  • the aluminum from this near-surface outer phase is capable of in the direct sintering of the green body, in which a shrinkage of the green body is achieved in the order of about 10 to 30%, which the execution provisionally seals--, as a result of the heat treatment in the direct sintering, a reaction with the oxygen of the PCA part, so the plug or preferably the end of the discharge vessel, each consisting predominantly of Al 2 O 3 (PCA), enter and thus a To create firm connection between the plug and the end of the discharge vessel and the implementation.
  • the adhesive layer converts partially or completely into a cermet of Mo, V and Al 2 O 3 .
  • this type of sealing can also be used for a system consisting of MoV part of the leadthrough and a cermet plug made of Mo and Al 2 O 3 , with the proportions Mo: V having to be chosen differently than in the case of adaptation of the thermal expansion coefficient pure Al 2 O 3 plug. however, in the following, the term PCA part will be used for all these variants.
  • the adhesive partner is the direct end of the discharge vessel, because then a completely glass solder-free simple and secure connection is possible, which allows a reliable seal by combining a direct sintering with additional adhesive layer.
  • a protective gas of inert gas such as in particular argon and / or nitrogen N2 is used, which in a specific embodiment contains a small proportion of 20 to 200 ppm oxygen O2.
  • the adhesive layer consists either only partially or more or less completely of a cermet of Mo, V and Al 2 O 3 , whereby proportions of the initially present MoxAlyVz layers can be obtained with gradient structure.
  • a MoV alloy in the sealing area of the bushing is used instead of Mo.
  • the alloy is adjusted so that its thermal expansion coefficient is about 8 x 10 -6 K -1 .
  • PCA ie polyceramic Al 2 O 3 .
  • the alloy can also be adjusted so that an adaptation to a cermet plug is possible by increasing the Mo content.
  • MoV is similar to pure Mo alitieren.
  • the Al portion of the alloy reacts well enough to accomplish an adhesive layer.
  • This Alitianssvon is time and temperature dependent, so that initially forms in the adhesive layer, a gradient structure with Al-richer and Al-poorer phases.
  • the proportion of vanadium in the molybdenum-vanadium alloy (MoV), the adaptation to pure PCA should be below 50 wt .-%.
  • the proportion of vanadium should be much smaller in Range of, for example, about 8 to 25 wt .-%, since the coefficient of thermal expansion of vanadium in the order of 9.6 x 10 * -6 K -1 .
  • that of molybdenum is much smaller, it is about 5.7 x 10 * -6 K -1 .
  • the good adhesion is achieved by the temporary formation of an intermetallic microstructure which forms as a gradient structure from the Mo content of the base material of the feedthrough to the ceramic.
  • the tube dimensions of the MoV-containing bushing may be conventional, such as in EP-A 528 428 explained.
  • the passage is preferably a tube with a diameter of 0.5 to 3 mm.
  • the wall thickness is for example 100 to 300 microns.
  • the (MoV) 3A18 "layer located on the outside of the leadthrough from MoV reacts with the oxygen at the surface of the ceramic, so that in this layer Al is converted to Al 2 O 3 , whereby the original (MoV) 3A18 becomes an Al poorer phase.
  • This resulting Cermet Mo-A1203 forms in its reaction a toothed layer, which ensures particularly good adhesion.
  • the reaction in the cermet plug occurs mainly on the surface of larger grains of Al 2 O 3 , where the Al is very reactive.
  • the treatment for producing the reactive oxygen is promoted in particular by using a protective gas during the direct sintering, consisting of an inert gas-oxygen mixture, wherein only small amounts of oxygen may be added to the inert gas, preferably argon and / or nitrogen. These are in the order of a partial pressure of 20 to 200 ppm, in particular at most 100 ppm. If more oxygen is added, molybdenum on the surface oxidizes to MoO2 or MoO3. These substances are volatile and are not suitable for improving adhesion.
  • a protective gas during the direct sintering consisting of an inert gas-oxygen mixture, wherein only small amounts of oxygen may be added to the inert gas, preferably argon and / or nitrogen. These are in the order of a partial pressure of 20 to 200 ppm, in particular at most 100 ppm. If more oxygen is added, molybdenum on the surface oxidizes to MoO2 or MoO3. These substances are volatile and are not suitable for improving adhesion.
  • FIG. 1 schematically is a metal halide lamp shown with an outer bulb 1 made of tempered glass or. Quartz glass, which has a longitudinal axis and is closed on one side by a plate smelting 2. At the plate smelting 2, two power supply lines are led outwards (not visible). They end in a base 5.
  • a two-sided sealed ceramic discharge vessel 10 made of Al 2 O 3 (PCA) with a filling of metal halides is inserted axially.
  • the discharge vessel 10 may be cylindrical or inwardly spherical or elliptical with capillary ends 21.
  • Electrodes 3 which are fastened to feedthroughs made of MoV, protrude into the discharge vessel.
  • the passage is preferably a tube, but may also be a pin.
  • the implementation may also be divided into two and consist only of the front end of the implementation of MoV.
  • ignitable gas from the group of noble gases in the discharge vessel.
  • a mixture of metal halides as known per se for example, iodides of Na Tl and Dy and possibly mercury.
  • Ca can also be used as a halide.
  • FIG. 2 schematically the connection between MoV tube and an Al 2 O 3 stopper is shown in detail.
  • the passage 6 made of a molybdenum-vanadium alloy with 30 wt .-% vanadium is shown as a base material 11, on the surface of a thin first layer 12 of AlxMoyVz formed with a high proportion of Al.
  • This layer is formed by an Alit michsvon.
  • the aluminum diffuses into deeper layers of the leadthrough to form one or more AlxMoyVz thin layers 13 containing less Al and formed between the thin first layer and the MoV backbone. This layer sequence is achieved by the diffusion of the aluminum into the surface of the MoV tube.
  • the Alit ist takes place at 700 to 1200 ° C over a duration, which is in the order of a few hours.
  • the aluminized MoV tube is now inserted into the green plug and directly sintered.
  • the aluminum from the layer of AlxMoyVz on the surface of the bushing reacts with the direct sintering with the oxygen content of the stopper 14 made of Al 2 O 3 , so that a thin adhesive layer 20 is formed on the surface of the plug above the base body 15.
  • the layers 12, 13 of the intermetallic phases together form the new adhesive layer 20, which consists partly, predominantly or completely of a cermet of Mo and Al 2 O 3 .
  • FIG. 3 shows another embodiment in which a MoV tube is inserted directly into the end 21 of a ceramic discharge vessel. It is in it by direct sintering held, similar to FIG. 2 described.
  • the implementation is shown as a MoV tube 11, to which the end 21 is connected via the novel adhesive layer 20 to the outside.
  • the gearing is not shown to scale.
  • the implementation does not have to consist entirely of molybdenum-vanadium alloy. It is sufficient if it consists partially, in the sealed part of MoV.
  • a back part of the bushing may be niobium, as known per se, or the MoV part may have a core of other material, as also known per se.
  • the PCA part, in which the bushing is sintered directly can be, for example, a plug, or the end of the discharge vessel, or else another intermediate part.
  • PCA stands for polykeramic Al 2 O 3 , as known per se.

Claims (6)

  1. Lampe aux halogénures métalliques qui comprend une enceinte (10) de décharge en céramique, transparente, en Al2O3 (PCA), des traversées (6) pénétrant dans l'enceinte (10) de décharge par des ouvertures à ses extrémités (21), chaque traversée (6) étant au moins en partie en un alliage de molybdène et de vanadium, dénommé dans ce qui suit partie (11) en MoV, et portant une électrode (3), la traversée étant rendue étanche dans l'ouverture, caractérisée en ce que la partie (11) en MoV de la traversée est rendue étanche dans une partie PCA par une couche (20) d'adhérence, qui contient en même temps Al et Mo.
  2. Lampe aux halogénures métalliques, suivant la revendication 1, caractérisée en ce que la couche d'adhérence est constituée à partir d'une couche interne métallique AlxMoyVz, qui a un gradient.
  3. Lampe aux halogénures métalliques, suivant la revendication 1, caractérisée en ce que la traversée est un tube.
  4. Lampe aux halogénures métalliques, suivant la revendication 1, caractérisée en ce que la traversée est reliée à la partie PCA, qui est un tampon, directement à l'extrémité de l'enceinte de décharge, de préférence en utilisant un frittage direct.
  5. Lampe aux halogénures métalliques, suivant la revendication 1, caractérisée en ce que la couche d'adhérence est constituée en tout ou partie d'un cermet qui contient Mo, V et Al2O33.
  6. Procédé de fabrication d'une lampe aux halogénures métalliques, suivant la revendication 1, dans lequel on obtient une liaison entre une partie PCA et la partie en MoV de la traversée par les étapes suivantes : (a) on fait diffuser de l'Al dans la surface de la partie en MoV au moyen d'un processus d'aluminage ; (b) on introduit la partie en MoV aluminée dans la partie PCA à vert ; (c) on fritte directement avec traitement thermique, le cas échéant avec apport d'un gaz de protection qui a notamment une proportion petite d'oxygène d'au plus 200 ppm, une couche d'adhérence dans la région de l'aluminage.
EP06819826A 2005-12-09 2006-11-29 Lampe aux halogenures metalliques Not-in-force EP1958238B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005058895A DE102005058895A1 (de) 2005-12-09 2005-12-09 Metallhalogenidlampe
PCT/EP2006/069038 WO2007065819A2 (fr) 2005-12-09 2006-11-29 Lampe aux halogenures metalliques

Publications (2)

Publication Number Publication Date
EP1958238A2 EP1958238A2 (fr) 2008-08-20
EP1958238B1 true EP1958238B1 (fr) 2009-09-30

Family

ID=37988959

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06819826A Not-in-force EP1958238B1 (fr) 2005-12-09 2006-11-29 Lampe aux halogenures metalliques

Country Status (8)

Country Link
US (1) US7863819B2 (fr)
EP (1) EP1958238B1 (fr)
JP (1) JP4773527B2 (fr)
CN (1) CN100578726C (fr)
AT (1) ATE444562T1 (fr)
CA (1) CA2631372A1 (fr)
DE (2) DE102005058895A1 (fr)
WO (1) WO2007065819A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7923932B2 (en) * 2007-08-27 2011-04-12 Osram Sylvania Inc. Short metal vapor ceramic lamp
CN100570810C (zh) * 2008-11-19 2009-12-16 宁波亚茂照明电器有限公司 陶瓷金属卤化物灯电弧管
US20130187066A1 (en) * 2010-10-11 2013-07-25 Osram Ag Infrared emitter

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7405715A (fr) * 1973-06-22 1974-12-24
US4366410A (en) * 1980-11-21 1982-12-28 Gte Laboratories Incorporated Vacuum-tight assembly particularly for a discharge tube
US4545799A (en) * 1983-09-06 1985-10-08 Gte Laboratories Incorporated Method of making direct seal between niobium and ceramics
JPH02156534A (ja) * 1988-12-08 1990-06-15 Fujitsu Ltd 半導体装置及び半導体装置の製造方法
JP3081765B2 (ja) * 1994-11-17 2000-08-28 トーカロ株式会社 炭素部材およびその製造方法
JPH1145682A (ja) * 1997-07-26 1999-02-16 Toto Ltd ランプ、導電性材料及びその製造方法
JPH10334852A (ja) * 1997-05-30 1998-12-18 Iwasaki Electric Co Ltd メタルハライドランプ
DE19727428A1 (de) * 1997-06-27 1999-01-07 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metallhalogenidlampe mit keramischem Entladungsgefäß
EP1053564B1 (fr) 1998-12-08 2004-07-21 Koninklijke Philips Electronics N.V. Lampe electrique
JP2003297289A (ja) * 2002-01-30 2003-10-17 Toshiba Lighting & Technology Corp 高圧放電ランプおよび多重管形高圧放電ランプならびに照明装置
DE10220735A1 (de) * 2002-05-08 2003-11-20 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zum Herstellen einer Metall-Keramik-Verbindung
KR101120515B1 (ko) * 2004-06-14 2012-02-29 코닌클리즈케 필립스 일렉트로닉스 엔.브이. 세라믹 금속 할로겐화 방전 램프

Also Published As

Publication number Publication date
JP2009518792A (ja) 2009-05-07
DE102005058895A1 (de) 2007-06-14
CN101322221A (zh) 2008-12-10
WO2007065819A2 (fr) 2007-06-14
CA2631372A1 (fr) 2007-06-14
WO2007065819A3 (fr) 2008-03-20
JP4773527B2 (ja) 2011-09-14
EP1958238A2 (fr) 2008-08-20
CN100578726C (zh) 2010-01-06
US7863819B2 (en) 2011-01-04
DE502006005007D1 (de) 2009-11-12
US20090134796A1 (en) 2009-05-28
ATE444562T1 (de) 2009-10-15

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