EP0887839A2 - Lampe à halogénure métallique avec enveloppe céramique - Google Patents

Lampe à halogénure métallique avec enveloppe céramique Download PDF

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Publication number
EP0887839A2
EP0887839A2 EP98110522A EP98110522A EP0887839A2 EP 0887839 A2 EP0887839 A2 EP 0887839A2 EP 98110522 A EP98110522 A EP 98110522A EP 98110522 A EP98110522 A EP 98110522A EP 0887839 A2 EP0887839 A2 EP 0887839A2
Authority
EP
European Patent Office
Prior art keywords
capillary tube
cermet
discharge lamp
lamp according
pin
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.)
Granted
Application number
EP98110522A
Other languages
German (de)
English (en)
Other versions
EP0887839B1 (fr
EP0887839A3 (fr
Inventor
Roland Hüttinger
Dieter Lang
Rita Tiedt
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 EP0887839A2 publication Critical patent/EP0887839A2/fr
Publication of EP0887839A3 publication Critical patent/EP0887839A3/fr
Application granted granted Critical
Publication of EP0887839B1 publication Critical patent/EP0887839B1/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
    • 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
    • H01J61/361—Seals between parts of vessel
    • H01J61/363—End-disc seals or plug seals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/827—Metal halide arc lamps

Definitions

  • This registration is closely related to the following registrations: internal file number 97P5540, 97P5542, 93-1-480, 97-1-001.
  • the invention is based on a high-pressure discharge lamp, in particular a metal halide lamp with a ceramic discharge vessel according to the The invention is also applicable to high pressure sodium lamps applicable. It is in particular lamps whose Operating temperature is relatively high, and on the order of up to 1000 ° C.
  • a metal halide lamp with a ceramic lamp is already known from US Pat. No. 4,602,956 Discharge vessel known, in which the electrode in a passage, which is designed as a disc made of electrically conductive cermet, sintered is.
  • the implementation is also of an annular plug surrounded by cermet, the one with the ceramic discharge vessel Alumina is connected by means of glass solder.
  • the glass solder is however through the aggressive filling components (especially halogens) corrodes. For these reasons, the lifespan is rather short.
  • Disadvantage of this Arrangement is further that the embedding of the electrode in the cermet feedthrough to tensions and finally to cracks and cracks in the Cermet can lead. Due to the large diameter of the disc-like The discharge arc can also carry out, which is electrically conductive hit back slightly to carry out what for quick Darkness leads.
  • EP-A 587 238 describes a metal halide lamp with a ceramic discharge vessel described that an extremely elongated capillary tube Aluminum oxide as the inner part of the plug, in which a glass solder is used pin-like metallic feedthrough at the outer end (melting area) is attached. It is crucial that the melting area is at a sufficiently low temperature.
  • the implementation pin can consist of two parts, one of which faces the discharge Part made of electrically conductive cermet containing carbide, silicide or nitride, can be made. This sealing technique creates a large overall length of the discharge vessel. It is very complex to manufacture and based also on the corrosion-prone glass solder.
  • the object of the present invention is a high-pressure discharge lamp with ceramic discharge vessel according to the preamble of the claim 1 to provide, which has a long service life and thereby Glass solder completely dispensed with.
  • the sealing area should be vacuum-tight and resistant to high temperatures and not susceptible to corrosion.
  • the bushing contains at least one component made of cermet with a special property that can be used for a glass solder-free connection technology.
  • This component of the bushing is sintered directly with the surrounding sealant.
  • No purely metallic partners are involved, so that a highly vacuum-tight bond can form, which is a crucial prerequisite for the desired long service life (reliably more than 10,000 hours).
  • the part of the bushing involved in the direct sintering is subject to shrinkage even during the sintering process, as a result of which a better adaptation to the sealant which is also subjected to shrinkage is achieved.
  • the thermal expansion coefficients of the partners involved are closer together than when using a metal bushing.
  • the mass of this component is so small (because in the case of a pin the external diameter of the component is relatively small and because in the case of a capillary tube the wall thickness of the tube is so small) that the absolute difference in expansion are low when there is a change in temperature.
  • the end face facing the discharge is relatively small, so that back arcing "can be avoided.
  • This cermet component is directly or indirectly connected to the shaft of the electrode (via an additional component) connected by welding. Tensions in this area are therefore largely avoided as well sintering of the shaft in the bushing is dispensed with.
  • the present invention is a high-pressure discharge lamp, especially metal halide lamp or high pressure sodium lamp, with ceramic discharge vessel (usually made of aluminum oxide, but aluminum nitride or aluminum oxynitride is also suitable), which is usually surrounded by an outer bulb.
  • the discharge vessel has two ends which are closed with sealing means. These are usually one- or multi-part plugs or are also suitable molded integral ends of the discharge vessel itself.
  • the following construction is at least at one end of the discharge vessel realized.
  • one is electrical conductive bushing vacuum-sealed, on which one Electrode is fastened with a shaft that goes into the interior of the discharge vessel protrudes.
  • the implementation comprises a component made from a cermet, whose metal content is so high that it can be welded like a metal, whereby the component made of cermet without glass solder in the sealant by direct sintering is attached.
  • the sealant is also without glass solder fixed in the discharge vessel by direct sintering.
  • the ceramic part The cermet consists of aluminum oxide (or aluminum nitride or Aluminum oxynitride), the metallic one made of tungsten, molybdenum or rhenium (or their alloys).
  • the basic structure of materials for Cermets is known per se, see for example those mentioned at the beginning State of the art or the documents EP-A 528 428 and EP-A 609 477. Das The material of the cermet component must be weldable according to the invention. In some Embodiments should also be electrically conductive. But this is not absolutely necessary in every case. A concrete example of one weldable and electrically conductive cermets make up 50% by volume Metal on the entire cermet, remainder aluminum oxide.
  • the cermet component is the Carrying out a pen made of electrically conductive cermet, the shaft of the Electrode is butt welded to the end face of the pin.
  • This design is particularly suitable for high-watt lamps (100 W and more).
  • the cermet pen is usually the only component of the bushing (it however, multi-part designs are also possible).
  • the pen itself is in the sealant is sintered directly.
  • the sealing means is preferably an annular stopper which is entirely or partially (namely its inner part) made of electrically non-conductive Cermet exists.
  • the plug can consist of several concentric Parts exist.
  • the innermost stopper part is preferably a capillary tube short length, the outside of another annular Plug part (made of a cermet with a lower metal content, pure aluminum oxide or the like) is surrounded. So that with regard to the coefficient of thermal expansion a gradual, gradual, radially directed transition reached to the discharge vessel.
  • the implementation is recessed into the sealant, so that contact with the filling is minimized and the temperature load is reduced.
  • cermet is suitable for small-watt lamps performing a capillary tube.
  • This capillary tube is in the sealant sintered directly.
  • the aspect of electrical conductivity plays a role here not a big role. Only the weldability of the capillary tube is essential due to a sufficiently high proportion of metal in the cermet.
  • the electrical conductivity of the capillary tube can, however, be accepted. To avoid the back arcing ", it is then advantageous if the capillary tube is arranged in the sealing means in a blind hole which is protected against the discharge.
  • the implementation consists of at least two parts.
  • the implementation includes one electrically conductive pin, which is surrounded by the capillary tube.
  • the pen can even serve as an electrode shaft or be connected to it. He can also protrude beyond the capillary tube around the connection to the outside To facilitate power supply.
  • This bushing pin is made of tungsten, molybdenum or an electrical one conductive cermet.
  • the pin with the capillary tube is advantageous Welded distal end of the tube. This leaves between Pen and surrounding capillary tube just a narrow gap that the different thermal expansion taken into account.
  • a metal halide lamp with an output of 150 W is shown schematically in FIG. It consists of a cylindrical outer bulb 1 made of quartz glass which defines a lamp axis and is squeezed (2) and base (3) on two sides.
  • the axially arranged discharge vessel 4 made of Al 2 O 3 ceramic is bulged in the middle 5 and has two cylindrical ends 6a and 6b. It is held in the outer bulb 1 by means of two power leads 7, which are connected to the base parts 3 via foils 8.
  • the power supply lines 7 are welded to bushings 9, 10, which are each fitted in an end plug 11 at the end of the discharge vessel.
  • the bushings 9, 10 are cermet pins with a diameter of approx. 1 mm, made of a conductive, weldable cermet with about 50 wt .-% Molybdenum content, the rest of aluminum oxide.
  • Both bushings 9, 10 are on the plug 11 on both sides and hold Discharge side electrodes 14, consisting of an electrode shaft 15 made of tungsten and one pushed on at the discharge end Spiral 16.
  • the bushing 9, 10 is in each case with the electrode shaft 15 and butt welded to the outer power supply 7.
  • the discharge vessel is filled, e.g. Argon, from mercury and additives to metal halides.
  • Argon e.g. Argon
  • the end plugs 11 essentially consist of Al 2 O 3 .
  • a non-conductive, non-weldable cermet with the main component Al 2 O 3 , with tungsten containing about 30% by weight as the metallic component (or molybdenum with a correspondingly higher proportion).
  • tungsten containing about 30% by weight as the metallic component (or molybdenum with a correspondingly higher proportion).
  • Further possibilities of a suitable composition for the cermet are specified in the prior art described at the beginning.
  • the bushing 9, 10 is sintered directly into the plug 11. More like that The plug 11 is also in each case in the cylindrical end 6 of the Discharge vessel sintered directly (i.e. without glass solder).
  • a cermet pen which is next to Alumina at least 40 vol .-% metal (preferably between 45 and 75 Vol .-%) contains and is weldable and possibly electrically conductive. Especially 70 to 90% by weight of tungsten or 55 to 80% by weight of molybdenum is suitable (or an amount of rhenium equivalent in volume)
  • a material that is less suitable is a material for the end plug Proportion of metal as the leadthrough (preferably about half the Share in the implementation) contains.
  • Essential property of the plug is that its coefficient of thermal expansion between that of Implementation and that of the discharge vessel.
  • the metal part of the Plugging can also be zero.
  • the electrode is welded to the face of the bushing before sintering the bushing into the stopper.
  • the weldable Cermet pencil is largely pre-sintered before it is finally sintered.
  • a non-conductive Plug 26 sintered directly.
  • the implementation is electrical again conductive cermet stick 9, 10 with a similar composition (the metal content is however chosen with 50 vol .-% higher) as described above.
  • the stopper Alumina 26 consists of two concentric parts, one outer annular plug part 21 and an inner, about twice long capillary tube 20. Nevertheless, the capillary tube is compared to known ones Capillary tube techniques about 50% shorter. The compared to Plug part 21 large length of the capillary tube improves the sealing behavior.
  • the cermet pin 9 is inserted in the capillary tube 20 and there sintered directly.
  • the filling bore 22 is accommodated in the outer plug part 21.
  • the plug part 21 made of non-conductive cermet, but its metal content (approx. 10 vol.% tungsten) is smaller than that of the capillary tube.
  • the capillary tube 20 does not consist of conductive and non-weldable cermet with approx. 20 vol .-% tungsten.
  • the capillary tube 20 can but also from non-conductive and weldable cermet or from aluminum oxide consist.
  • the cermet pen can also be in a one-piece plug (see Fig. 1) deepened on the discharge side.
  • FIG 3 shows a further exemplary embodiment of a discharge vessel for a metal halide lamp of low power, for example 35 W.
  • the bulbous Discharge vessel 29 made of aluminum oxide has ends with reduced Diameters that act as a sealant 34 and shaped like a stopper are. Of course, a separate plug can also be used.
  • Each end 34 there is a central one facing away from the discharge Blind hole 27, which narrows stepwise to a passage opening 28.
  • the Implementation 30 consists of two parts.
  • a short capillary tube 31 weldable cermet is fitted in blind hole 27 and sintered there directly. It surrounds an electrically conductive pin 32, at the front, the Discharge welded end of the electrode shaft 33 butt welded is.
  • the pin 32 is either made of electrically conductive cermet or Metal, especially molybdenum.
  • the pin 32 ends on the discharge side in FIG Passage opening 28 or, in another preferred embodiment, already in the capillary tube 31.
  • the discharge vessel 29 is evacuated and filled in that at one end 34b initially only the capillary tube, but without a grommet, is sintered. After filling the grommet 32 together with the electrode inserted into the capillary tube up to the passage opening 28. In the area of the rear end of the pin 32, the pin 32 with the capillary tube 31 welded (36), for example by means of a laser or plasma torch.
  • This technique has the advantage that the discharge vessel is closed 29 itself, including the filling it contains, is relatively cold remains. Therefore there is no fear of the filling evaporating during welding.
  • this embodiment offers Advantages for small-watt lamps. Because they have small ones Dimensions so that there is space for a separate eccentric filling hole is missing. In addition, because of the smaller heat capacity is a small watt Lamp the problem of heating up much more critical.
  • This arrangement can also be implemented only at one end of the discharge vessel be while performing at the second end on other, conventional Is realized in this way or, for example, according to FIG. 1.
  • the capillary tube and grommet can be made the same electrically conductive material (cermet with high metal content) consist.
  • a plug with a blind hole is recommended to help fight back to prevent the discharge arc.
  • Another advantage is that two parts made of the same material can be welded particularly well and show the same thermal behavior.
  • the gap 35 between the capillary tube 31 and pin 32 can therefore be chosen as small as possible. The Condensation of filling in the gap is therefore minimal.
  • the metal content of the pin is higher than that of the Capillary tube.
  • the capillary tube can only be welded (approx. 35 to 40 vol.% tungsten). In in this case the blind hole can be dispensed with.
  • the capillary tube closes on the discharge side with the inside of the stopper.
  • the pin (especially if it is made of metal) can also, for example, on Protect the outside of the capillary tube so that the external power supply is good can be welded to it.
  • the external power supply can also be a have a tubular end that surrounds the capillary tube.
  • the outside diameter of the capillary tube is 2 to 3 mm depending on the power level.
  • the diameter of the Pen is typically 600 ⁇ m at low power (35 W).
  • the gap between the pen and capillary tube is a few tens of ⁇ m thick, for example 40 ⁇ m.
  • Such a glass solder-free sealing technology can withstand temperatures up to 1000 ° C, while when using glass solder only temperatures up to 700 ° C can be allowed.
  • the great advantage of the present invention is therefore the short overall length.
  • the Length of the capillary tube can be reduced by 50 to 70%. Because of the shortened and narrowed gap between pin and capillary tube can also the required filling quantity can be reduced by approx. 50%.
  • Tungsten is preferably used as the metal component of the cermet, if the corrosion resistance of the bushing or bushing component is in the foreground.
  • molybdenum is preferred when thermal adaptation is particularly critical.
  • the following information can be used as a guide for the cermet composition serve: in the case of tungsten as the metal partner of the cermet, the Guarantees weldability from about 35 to 40 vol .-% tungsten, which Electrical conductivity is sufficient from about 45 vol .-% tungsten.
  • the values for molybdenum are about 1.5 times higher.
EP98110522A 1997-06-27 1998-06-09 Lampe à halogénure métallique avec enveloppe céramique Expired - Lifetime EP0887839B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19727429A DE19727429A1 (de) 1997-06-27 1997-06-27 Metallhalogenidlampe mit keramischem Entladungsgefäß
DE19727429 1997-06-27

Publications (3)

Publication Number Publication Date
EP0887839A2 true EP0887839A2 (fr) 1998-12-30
EP0887839A3 EP0887839A3 (fr) 1999-03-31
EP0887839B1 EP0887839B1 (fr) 2002-12-18

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EP98110522A Expired - Lifetime EP0887839B1 (fr) 1997-06-27 1998-06-09 Lampe à halogénure métallique avec enveloppe céramique

Country Status (8)

Country Link
US (1) US6181065B1 (fr)
EP (1) EP0887839B1 (fr)
JP (1) JPH1167155A (fr)
CN (1) CN1151538C (fr)
AT (1) ATE230160T1 (fr)
CA (1) CA2241714A1 (fr)
DE (2) DE19727429A1 (fr)
HU (1) HU221395B1 (fr)

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WO2002037531A1 (fr) 2000-11-06 2002-05-10 Koninklijke Philips Electronics N.V. Lampe a decharge haute pression
WO2003058674A1 (fr) * 2002-01-08 2003-07-17 Koninklijke Philips Electronics N.V. Lampe a decharge haute pression et procede permettant la production d'une traversee pour electrode dans une telle lampe
US6617790B2 (en) 2000-05-31 2003-09-09 Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen Mbh Metal halide lamp with ceramic discharge vessel

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AU2002356372A1 (en) * 2002-01-15 2003-07-30 Koninklijke Philips Electronics N.V. High-pressure discharge lamp
CN100576421C (zh) * 2002-08-30 2009-12-30 松下电器产业株式会社 能够保持稳定特性的金属蒸汽放电灯和照明设备
US7132797B2 (en) * 2002-12-18 2006-11-07 General Electric Company Hermetical end-to-end sealing techniques and lamp having uniquely sealed components
US7525252B2 (en) * 2002-12-27 2009-04-28 General Electric Company Sealing tube material for high pressure short-arc discharge lamps
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US6856079B1 (en) 2003-09-30 2005-02-15 Matsushita Electric Industrial Co., Ltd. Ceramic discharge lamp arc tube seal
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US20060001346A1 (en) * 2004-06-30 2006-01-05 Vartuli James S System and method for design of projector lamp
US7667409B2 (en) * 2004-07-02 2010-02-23 Koninklijke Philips Electronics, N.V. Method for driving a lamp in a lighting system based on a goal energizing level of the lamp and a control apparatus therefor
US7164232B2 (en) * 2004-07-02 2007-01-16 Matsushita Electric Industrial Co., Ltd. Seal for ceramic discharge lamp arc tube
US9166214B2 (en) 2004-07-15 2015-10-20 General Electric Company Seal ring and associated method
JP2006283077A (ja) * 2005-03-31 2006-10-19 Ngk Insulators Ltd 複合体
KR20060130506A (ko) * 2005-06-14 2006-12-19 도시바 라이텍쿠 가부시키가이샤 고압 방전램프, 고압 방전램프 점등장치 및 조명장치
DE102005058896A1 (de) * 2005-12-09 2007-06-14 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe mit keramischem Entladungsgefäß
DE102006002261A1 (de) 2006-01-17 2007-07-19 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe
US7511429B2 (en) 2006-02-15 2009-03-31 Panasonic Corporation High intensity discharge lamp having an improved electrode arrangement
DE102006052761A1 (de) * 2006-11-08 2008-05-15 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Keramisches Entladungsgefäß und Hochdruckentladungslampe mit einem derartigen Entladungsgefäß
ATE478433T1 (de) * 2006-12-20 2010-09-15 Koninkl Philips Electronics Nv Metallhalidlampe und keramikbrenner für derartige lampe
DE102007045079A1 (de) 2007-09-21 2009-04-02 Osram Gesellschaft mit beschränkter Haftung Hochdruckentladungslampe
CN101828248B (zh) * 2007-10-19 2012-02-22 奥斯兰姆有限公司 高压放电灯
US8092270B2 (en) * 2008-04-04 2012-01-10 Powerspan Corp. Tubulation-free gas filled electrode or lamp
DE102008026522A1 (de) * 2008-06-03 2009-12-10 Osram Gesellschaft mit beschränkter Haftung Hochdruckentladungslampe
CN101901735A (zh) * 2010-07-26 2010-12-01 潮州市晨歌电光源有限公司 一种电极组件
JPWO2012046598A1 (ja) * 2010-10-08 2014-02-24 日本碍子株式会社 セラミックチューブ及びその製造方法
CN101980353B (zh) * 2010-10-14 2013-04-17 杨潮平 共烧封接高效陶瓷灯及其制备方法
KR101932796B1 (ko) * 2012-05-07 2018-12-27 페더럴-모굴 이그니션 컴퍼니 수축 끼워맞춤 세라믹 중앙 전극

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EP0528428A1 (fr) * 1991-08-20 1993-02-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe à décharge à haute pression et procédé de fabrication
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Publication number Priority date Publication date Assignee Title
US6617790B2 (en) 2000-05-31 2003-09-09 Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen Mbh Metal halide lamp with ceramic discharge vessel
WO2002037531A1 (fr) 2000-11-06 2002-05-10 Koninklijke Philips Electronics N.V. Lampe a decharge haute pression
US6750611B2 (en) 2000-11-06 2004-06-15 Koninklijke Philips Electronics N.V. High-pressure discharge lamp having a ceramic discharge vessel with a cermet lead-through
CN1322541C (zh) * 2000-11-06 2007-06-20 皇家菲利浦电子有限公司 高压放电灯
WO2003058674A1 (fr) * 2002-01-08 2003-07-17 Koninklijke Philips Electronics N.V. Lampe a decharge haute pression et procede permettant la production d'une traversee pour electrode dans une telle lampe

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DE19727429A1 (de) 1999-01-07
HU221395B1 (en) 2002-09-28
JPH1167155A (ja) 1999-03-09
EP0887839B1 (fr) 2002-12-18
HU9801467D0 (en) 1998-08-28
HUP9801467A3 (en) 2001-02-28
ATE230160T1 (de) 2003-01-15
DE59806681D1 (de) 2003-01-30
EP0887839A3 (fr) 1999-03-31
US6181065B1 (en) 2001-01-30
CN1151538C (zh) 2004-05-26
CN1204858A (zh) 1999-01-13
CA2241714A1 (fr) 1998-12-27
HUP9801467A2 (hu) 1999-01-28

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