FR2334644A1 - Electrically conductive cermet has metal coating on particles - of refractory oxide forming conductive lattice - Google Patents

Electrically conductive cermet has metal coating on particles - of refractory oxide forming conductive lattice

Info

Publication number
FR2334644A1
FR2334644A1 FR7637118A FR7637118A FR2334644A1 FR 2334644 A1 FR2334644 A1 FR 2334644A1 FR 7637118 A FR7637118 A FR 7637118A FR 7637118 A FR7637118 A FR 7637118A FR 2334644 A1 FR2334644 A1 FR 2334644A1
Authority
FR
France
Prior art keywords
iii
cermet
refractory oxide
electrically conductive
particles
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
FR7637118A
Other languages
French (fr)
Other versions
FR2334644B1 (en
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.)
Thorn Electrical Industries Ltd
Original Assignee
Thorn Electrical Industries Ltd
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
Priority claimed from GB50481/75A external-priority patent/GB1571084A/en
Application filed by Thorn Electrical Industries Ltd filed Critical Thorn Electrical Industries Ltd
Publication of FR2334644A1 publication Critical patent/FR2334644A1/en
Application granted granted Critical
Publication of FR2334644B1 publication Critical patent/FR2334644B1/fr
Granted legal-status Critical Current

Links

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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
    • C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/17—Metallic particles coated with metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps

Abstract

Electrically conductive cermet (I) consists of refractory oxide granules (II) with a thin coating of a gp. IVB-VIIB or gp. VIII metal (III). forming a conducting lattice which extends throughout the entire (I). Pref. (II) consists of Al2O3 and (III) is W or Mo. (I) can be formed integrally with an insulating cermet (IV) consisting of the same (II) and (III) and in the same vol. ratio. The claims over the use of the (integral) cermet for terminal cap or tube of an electric (discharge) lamp. (I) with a low (III) content can be used giving a coefft. of thermal expansion closely matching that of a refractory oxide ceramic, e.g. polycrystalline Al2O3. The fraction of (III) by vol is 0.045-0.2 pref. 0.067-0.2. For caps (IV) is used near the lamp envelope and (I) as zone(s) passing through this and holding the filament. For tubes (I) is used at both ends and (IV) in the middle or (I) is in strips along the inside of the tube.
FR7637118A 1975-12-09 1976-12-09 Electrically conductive cermet has metal coating on particles - of refractory oxide forming conductive lattice Granted FR2334644A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB50481/75A GB1571084A (en) 1975-12-09 1975-12-09 Electric lamps and components and materials therefor
GB935976 1976-03-09

Publications (2)

Publication Number Publication Date
FR2334644A1 true FR2334644A1 (en) 1977-07-08
FR2334644B1 FR2334644B1 (en) 1982-08-06

Family

ID=26242884

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7637118A Granted FR2334644A1 (en) 1975-12-09 1976-12-09 Electrically conductive cermet has metal coating on particles - of refractory oxide forming conductive lattice

Country Status (6)

Country Link
JP (1) JPS6035422B2 (en)
AU (1) AU532015B2 (en)
DE (1) DE2655726A1 (en)
FR (1) FR2334644A1 (en)
NL (1) NL183995C (en)
NZ (1) NZ182774A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011993A1 (en) * 1978-12-01 1980-06-11 Thorn Emi Plc Electric discharge lamps
FR2476636A1 (en) * 1980-02-26 1981-08-28 Euroceral Translucent alumina tube for sodium vapour lamps - with opaque, electrically conducting regions to improve service life
FR2498012A1 (en) * 1981-01-09 1982-07-16 Egyesuelt Izzolampa DISCHARGE RECEPTACLE FOR HIGH PRESSURE SODIUM VAPOR BLADES
EP0160445A2 (en) * 1984-04-25 1985-11-06 Ngk Insulators, Ltd. Discharge tube assembly for high-pressure discharge lamp

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2029817A (en) * 1978-09-06 1980-03-26 Thorn Electrical Ind Ltd Sealing of ceramic and cermet partds
JPS58195826U (en) * 1982-06-24 1983-12-26 横河電機株式会社 electromagnetic flow meter
JPH0279556U (en) * 1988-12-07 1990-06-19
DE4221101C2 (en) * 1992-06-26 1994-05-05 Veitsch Radex Ag Use of a refractory ceramic mass for lining floors on electric arc furnaces
DE19908688A1 (en) * 1999-02-26 2000-08-31 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metal halide lamp with ceramic discharge tube
JP4585823B2 (en) * 2004-09-24 2010-11-24 東芝ライテック株式会社 Tube and sealing member

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3369877A (en) * 1965-09-20 1968-02-20 Ford Motor Co Dispersion strengthened aluminum oxide with tungsten or molybdenum
DE1646552A1 (en) * 1967-09-19 1971-07-22 Kernforschung Gmbh Ges Fuer Process for the production of a good electrically conductive ceramic with a low metal content
FR2173092A1 (en) * 1972-02-21 1973-10-05 Philips Nv
FR2219131A1 (en) * 1973-02-26 1974-09-20 Commissariat Energie Atomique

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE795679A (en) * 1972-02-21 1973-08-20 Philips Nv HIGH PRESSURE DISCHARGE LAMP
FR2187725A1 (en) * 1972-06-05 1974-01-18 Commissariat Energie Atomique Porous cermet reactor fuel - by sintering oxides metal powder and binder
GB1441199A (en) * 1973-07-26 1976-06-30 Inst Vysokikh Temperatur Akade Refractory materials flame

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3369877A (en) * 1965-09-20 1968-02-20 Ford Motor Co Dispersion strengthened aluminum oxide with tungsten or molybdenum
DE1646552A1 (en) * 1967-09-19 1971-07-22 Kernforschung Gmbh Ges Fuer Process for the production of a good electrically conductive ceramic with a low metal content
FR2173092A1 (en) * 1972-02-21 1973-10-05 Philips Nv
FR2219131A1 (en) * 1973-02-26 1974-09-20 Commissariat Energie Atomique

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0011993A1 (en) * 1978-12-01 1980-06-11 Thorn Emi Plc Electric discharge lamps
FR2476636A1 (en) * 1980-02-26 1981-08-28 Euroceral Translucent alumina tube for sodium vapour lamps - with opaque, electrically conducting regions to improve service life
FR2498012A1 (en) * 1981-01-09 1982-07-16 Egyesuelt Izzolampa DISCHARGE RECEPTACLE FOR HIGH PRESSURE SODIUM VAPOR BLADES
EP0160445A2 (en) * 1984-04-25 1985-11-06 Ngk Insulators, Ltd. Discharge tube assembly for high-pressure discharge lamp
EP0160445A3 (en) * 1984-04-25 1987-04-01 Ngk Insulators, Ltd. Ceramic envelope device for high-pressure discharge lamp

Also Published As

Publication number Publication date
JPS6035422B2 (en) 1985-08-14
DE2655726A1 (en) 1977-06-16
JPS5271695A (en) 1977-06-15
AU532015B2 (en) 1983-09-15
NL183995C (en) 1989-03-16
AU2044076A (en) 1979-05-17
NL183995B (en) 1988-10-17
NL7613722A (en) 1977-06-13
FR2334644B1 (en) 1982-08-06
NZ182774A (en) 1979-06-19
DE2655726C2 (en) 1987-12-17

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse