EP0226978A2 - Lampe à ampoule de verre en haute teneur d'acide silicique - Google Patents

Lampe à ampoule de verre en haute teneur d'acide silicique Download PDF

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Publication number
EP0226978A2
EP0226978A2 EP86117330A EP86117330A EP0226978A2 EP 0226978 A2 EP0226978 A2 EP 0226978A2 EP 86117330 A EP86117330 A EP 86117330A EP 86117330 A EP86117330 A EP 86117330A EP 0226978 A2 EP0226978 A2 EP 0226978A2
Authority
EP
European Patent Office
Prior art keywords
glass
solder
lamp
solder glass
weight
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
EP86117330A
Other languages
German (de)
English (en)
Other versions
EP0226978B1 (fr
EP0226978A3 (en
Inventor
Werner Dr. Weiss
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 EP0226978A2 publication Critical patent/EP0226978A2/fr
Publication of EP0226978A3 publication Critical patent/EP0226978A3/de
Application granted granted Critical
Publication of EP0226978B1 publication Critical patent/EP0226978B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/38—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
    • H01J5/38—Pinched-stem or analogous seals
    • 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
    • H01J61/368—Pinched seals or analogous seals

Definitions

  • the invention relates to a lamp with a bulb made of high-silica glass and power supply lines which are melted into the bulb in a vacuum-tight manner by means of foils, the SiO2 content of the high-silica glass being at least 96% by weight, and between each foil and the Piston glass an intermediate layer of solder glass is present.
  • the tightness of the melt between the molybdenum foil and the quartz glass can be improved by an intermediate layer.
  • a thin metal layer for example made of chrome (US Pat. No. 3,420,944) or a solder glass, for example made of lead phosphorus oxide (GB Pat. No. 1,485,378) to protect against molybdenum. to apply.
  • FR-PS 961 730 is also known, the large differences in the coefficient of thermal expansion (AK) between molybdenum (AK 50 ⁇ 10 ⁇ 7 K ⁇ 1) and quartz glass (AK 7 ⁇ 10 ⁇ 7 K ⁇ 1) by one or more
  • AK coefficient of thermal expansion
  • the vapor deposition of thin metal layers is associated with high costs for material and implementation of the technical process, while the lead phosphorus oxide glass is unsuitable for high temperatures.
  • the intermediate glasses which are adjusted with regard to the coefficient of expansion, are unsuitable for high temperatures; moreover, the application of several intermediate layers is very complex.
  • the invention has for its object to improve the tightness of the melt in a lamp with a bulb made of high-silica glass and power supplies that are melted into the bulb in a vacuum-tight manner by means of foils, and an intermediate layer of solder glass being present between each foil and the bulb glass .
  • solder glass has the following main components SiO2 60 - 70 wt .-% Al2O3 3-20% by weight K2O 12-18% by weight and, apart from minor impurities, is free of Na2O.
  • the intermediate layer withstands the exposure to temperature and chemical influences, such as occur with halogen lamps of high power, and thus the life duration of these lamps is extended.
  • the solder glass according to the invention not only prevents oxidation of the foils, but also improves the wetting ability and the wetting speed of the quartz glass / molybdenum system. As a result of the greatly improved adhesive power, the lack of adaptation of the thermal expansion coefficient is meaningless. The application of the glass solder does not require any additional pretreatment of the film.
  • the solder glass contains the following main components SiO2 66% by weight Al2O3 18% by weight K2O 15% by weight
  • the solder glass can be obtained inexpensively directly from potassium feldspar.
  • the solder glass is particularly advantageously applied to the film in an amount of 5-10 mg / cm 2. A smaller amount could not guarantee the complete wetting of a larger coherent surface on the film, a larger amount would endanger the tightness of the melt due to the increasing layer thickness.
  • Figure 1 shows a halogen lamp 1 of high power which is squeezed on one side.
  • the coil 3 is fastened to the two inner power supply lines 4 and 5.
  • the inner power supply lines 4 and 5 are connected to the outer power supply lines 8 and 9 via molybdenum foils 6 and 7, respectively.
  • the coil 3 is made of tungsten
  • the power supply lines 4, 5, 8, 9 are made of molybdenum.
  • a broad transverse strip in the middle of the foils 6, 7 is provided with an approximately 20 ⁇ m thick layer 10, 11 of a solder glass according to the invention.
  • the end regions of the foils 6, 7, in which the power supply wires 4, 5, 8, 9 end, remain spared from the coating.
  • the piston 2 can be surrounded by an outer piston.
  • FIG. 2 shows an exemplary embodiment of a metal halide discharge lamp 12 that is pinched on both sides.
  • two electrodes 14, 15 are fastened to inner power supply lines 16, 17, which are melted into the two ends of the bulb 13 by means of the foils 18, 19.
  • the conductive connection from the foils 18, 19 to the outside takes place via the two outer power supply lines 20, 21.
  • the sealing is also sealed here by a layer 22, 23 which is applied in the middle of the foils 18, 19 as a transverse strip guaranteed a solder glass according to the invention.
  • a suspension is first formed from the solder glass and an organic carrier material, which is already connected to the current supply wires 4, 5, 8, 9; 16, 17, 20, 21 equipped foils 6, 7; 18, 19 is applied in a neutral atmosphere (N2).
  • N2 a neutral atmosphere
  • the suspension medium, the flask 2; 13 and the frames are heated as usual to approx. 2000 ° C and then squeezed.
  • the solder glass must be molten on the surface of the film, but without flowing off the film. The viscosity of the solder glass must therefore not be too low or too high.
  • solder glasses which have the following composition (data in% by weight).
  • Solder glass 1 consists of 15% K2O, 18% Al2O3, the rest SiO2.
  • Solder glass 2 consists of 16.1% K2O, 3.5% Al2O3, 64.7% SiO2; it also contains compatible components, especially alkaline earth oxides.
  • Solder glass 2 has a somewhat lower melting point than solder glass 1.
  • the coefficient of expansion of both solder glasses is about 80 ⁇ 10 ⁇ 7 K ⁇ 1.
  • the improved adhesive effect between the molybdenum foil and quartz glass due to the solder glass can be demonstrated by measuring the wetting angle of a quartz glass drop on a molybdenum foil. Without the intermediate layer of solder glass according to the invention - regardless of the type of quartz glass and one possible doping - a wetting angle of approx. 100 ° measured. The application of the intermediate layer leads to a considerable improvement in the wetting properties; the wetting angle was reduced to about 45 ° by both solder glasses.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Glass Compositions (AREA)
EP86117330A 1985-12-18 1986-12-12 Lampe à ampoule de verre en haute teneur d'acide silicique Expired - Lifetime EP0226978B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853544825 DE3544825A1 (de) 1985-12-18 1985-12-18 Lampe mit einem kolben aus hochkieselsaeurehaltigem glas
DE3544825 1985-12-18

Publications (3)

Publication Number Publication Date
EP0226978A2 true EP0226978A2 (fr) 1987-07-01
EP0226978A3 EP0226978A3 (en) 1989-06-14
EP0226978B1 EP0226978B1 (fr) 1991-12-27

Family

ID=6288794

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86117330A Expired - Lifetime EP0226978B1 (fr) 1985-12-18 1986-12-12 Lampe à ampoule de verre en haute teneur d'acide silicique

Country Status (4)

Country Link
US (1) US4749902A (fr)
EP (1) EP0226978B1 (fr)
JP (1) JPS62147650A (fr)
DE (2) DE3544825A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009030264A1 (fr) * 2007-08-29 2009-03-12 Osram Gesellschaft mit beschränkter Haftung Procédé de fabrication d'une zone de scellement et lampe à décharge ainsi produite
EP2574637A1 (fr) 2011-09-30 2013-04-03 Basf Se Mélanges hautement résistants à base d'esters de polyarylène
WO2023285137A1 (fr) 2021-07-16 2023-01-19 Basf Se Composition de moulage thermoplastique à haute résistance à la température comprenant un polymère thermotrope
WO2023285136A1 (fr) 2021-07-16 2023-01-19 Basf Se Composition de moulage thermoplastique à haute résistance à la température comprenant un sulfure de polyphénylène

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4835439A (en) * 1987-09-29 1989-05-30 General Electric Company Increasing the oxidation resistance of molybdenum and its use for lamp seals
US4918353A (en) * 1987-09-29 1990-04-17 General Electric Company Reflector and lamp combination
DE3910878A1 (de) * 1989-04-04 1990-10-11 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Zweiseitig gesockelte hochdruckentladungslampe
DE4241152A1 (de) * 1992-12-07 1994-06-09 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Dotiertes Quarzglas und daraus hergestellte Gegenstände
JPH0785845A (ja) * 1993-09-01 1995-03-31 Philips Electron Nv 石英ガラスのランプ容器を有する白熱ランプ及びこのランプ容器用の石英ガラス
JP3664972B2 (ja) * 2000-12-05 2005-06-29 株式会社小糸製作所 アークチューブ
JP3926211B2 (ja) * 2002-05-29 2007-06-06 日本碍子株式会社 高圧水銀灯および高圧水銀灯用封止材
US7153179B2 (en) * 2002-11-07 2006-12-26 Advanced Lighting Technologies, Inc. Oxidation-protected metallic foil and method
US8277274B2 (en) * 2002-11-07 2012-10-02 Advanced Lighting Technologies, Inc. Apparatus and methods for use of refractory abhesives in protection of metallic foils and leads
CN100486819C (zh) 2004-01-29 2009-05-13 美克司株式会社 装订处理装置
US7759871B2 (en) * 2005-12-16 2010-07-20 General Electric Company High temperature seal for electric lamp
US9567463B2 (en) 2011-09-30 2017-02-14 Basf Se High-strength blends based on polyarylene ethers

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2193640A (en) * 1938-05-21 1940-03-12 Gen Electric Glass-to-metal seal
US3420944A (en) * 1966-09-02 1969-01-07 Gen Electric Lead-in conductor for electrical devices
US3515420A (en) * 1968-09-26 1970-06-02 Gen Electric Quartz to metal seal for electrical devices
NL6918746A (fr) * 1969-12-13 1971-06-15
US3723790A (en) * 1971-02-01 1973-03-27 Corning Glass Works Electrical lamp or tube comprising copper coated nickel-iron alloy electrical current conductors and a glass enclosure
JPS4971780A (fr) * 1972-11-15 1974-07-11
GB1485378A (en) * 1974-12-10 1977-09-08 Thorn Lighting Ltd Pinch foil seals
US4238705A (en) * 1979-09-12 1980-12-09 General Electric Company Incandescent lamp seal means
JPS5647142A (en) * 1979-09-25 1981-04-28 Toshiba Corp Detection system for error of transmitted data

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009030264A1 (fr) * 2007-08-29 2009-03-12 Osram Gesellschaft mit beschränkter Haftung Procédé de fabrication d'une zone de scellement et lampe à décharge ainsi produite
US8308519B2 (en) 2007-08-29 2012-11-13 Osram Ag Method for the production of a sealing region and discharge lamp produced by said method
EP2574637A1 (fr) 2011-09-30 2013-04-03 Basf Se Mélanges hautement résistants à base d'esters de polyarylène
WO2013045268A2 (fr) 2011-09-30 2013-04-04 Basf Se Blends à haute résistance à base d'éthers polyaryléniques
WO2023285137A1 (fr) 2021-07-16 2023-01-19 Basf Se Composition de moulage thermoplastique à haute résistance à la température comprenant un polymère thermotrope
WO2023285136A1 (fr) 2021-07-16 2023-01-19 Basf Se Composition de moulage thermoplastique à haute résistance à la température comprenant un sulfure de polyphénylène

Also Published As

Publication number Publication date
DE3683141D1 (de) 1992-02-06
EP0226978B1 (fr) 1991-12-27
DE3544825A1 (de) 1987-06-19
EP0226978A3 (en) 1989-06-14
JPS62147650A (ja) 1987-07-01
US4749902A (en) 1988-06-07

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