GB1475866A - High pressure metal vapour lamp and a transparent polycrystalline alumina tube therefor - Google Patents

High pressure metal vapour lamp and a transparent polycrystalline alumina tube therefor

Info

Publication number
GB1475866A
GB1475866A GB845676A GB845676A GB1475866A GB 1475866 A GB1475866 A GB 1475866A GB 845676 A GB845676 A GB 845676A GB 845676 A GB845676 A GB 845676A GB 1475866 A GB1475866 A GB 1475866A
Authority
GB
United Kingdom
Prior art keywords
tube
end portions
microns
high pressure
grain size
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
Application number
GB845676A
Other languages
English (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.)
NGK Insulators Ltd
NTT Inc
Original Assignee
NGK Insulators Ltd
Nippon Telegraph and Telephone Corp
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 NGK Insulators Ltd, Nippon Telegraph and Telephone Corp filed Critical NGK Insulators Ltd
Publication of GB1475866A publication Critical patent/GB1475866A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/111—Fine ceramics
    • C04B35/115—Translucent or transparent products

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
GB845676A 1975-03-18 1976-03-03 High pressure metal vapour lamp and a transparent polycrystalline alumina tube therefor Expired GB1475866A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50031769A JPS51107683A (en) 1975-03-18 1975-03-18 Taketsushotomeiaruminahatsukokan

Publications (1)

Publication Number Publication Date
GB1475866A true GB1475866A (en) 1977-06-10

Family

ID=12340241

Family Applications (1)

Application Number Title Priority Date Filing Date
GB845676A Expired GB1475866A (en) 1975-03-18 1976-03-03 High pressure metal vapour lamp and a transparent polycrystalline alumina tube therefor

Country Status (7)

Country Link
US (1) US4264541A (enExample)
JP (1) JPS51107683A (enExample)
DE (1) DE2609974C3 (enExample)
FR (1) FR2304589A1 (enExample)
GB (1) GB1475866A (enExample)
NL (1) NL176772C (enExample)
SU (1) SU651686A3 (enExample)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1597162A (en) * 1977-03-10 1981-09-03 Ngk Insulators Ltd Transparent polycrystalline alumina and high pressure vapour discharge lamp
JPS5477481A (en) * 1977-12-02 1979-06-20 Ngk Insulators Ltd Polycrystal transparent alumina light emitting tube and high voltage vapor discharge lamp using same
JPS6022670B2 (ja) * 1978-05-12 1985-06-03 日本碍子株式会社 多結晶透明アルミナ及びその製造法ならびに高圧蒸気放射灯用発光管
FR2476636A1 (fr) * 1980-02-26 1981-08-28 Euroceral Tube en alumine translucide localement noir et son procede de fabrication
US4736136A (en) * 1986-06-16 1988-04-05 Gte Laboratories Incorporated Discharge lamps with coated ceramic arc tubes and fabrication thereof
JP4613408B2 (ja) * 1999-10-15 2011-01-19 日本碍子株式会社 高圧放電灯用発光管の製造方法
JP2002184352A (ja) * 2000-07-19 2002-06-28 Ngk Insulators Ltd 高輝度放電灯用多結晶セラミックス発光管及びその製造方法
WO2002007187A1 (fr) * 2000-07-19 2002-01-24 Ngk Insulators, Ltd. Tube a arc en ceramique polycristalline pour lampe a decharge de haute brillance et procede de fabrication de ce tube
US6878456B2 (en) 2001-12-28 2005-04-12 3M Innovative Properties Co. Polycrystalline translucent alumina-based ceramic material, uses, and methods
US6648638B2 (en) 2001-12-28 2003-11-18 3M Innovative Properties Company Orthodontic appliances including polycrystalline alumina-based ceramic material, kits, and methods
JP4131240B2 (ja) * 2002-03-07 2008-08-13 日本碍子株式会社 高圧放電灯用発光容器及び多結晶透明アルミナ焼結体の製造方法
US6949145B2 (en) * 2002-04-05 2005-09-27 Boc, Inc. Vapor-assisted cryogenic cleaning
JP2008177151A (ja) * 2006-09-25 2008-07-31 Toshiba Lighting & Technology Corp 高圧放電ランプ、高圧放電ランプ点灯装置および照明装置
US20230005714A1 (en) * 2021-07-05 2023-01-05 Coorstek Kk Gas nozzle

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3026210A (en) * 1961-01-03 1962-03-20 Gen Electric Transparent alumina and method of preparation
US3026177A (en) * 1961-04-25 1962-03-20 Gen Electric Process for producing transparent polycrystalline alumina
GB1252851A (enExample) * 1969-08-27 1971-11-10
US3834939A (en) * 1970-02-19 1974-09-10 Ibm Method of forming doped silicon oxide layers on substrates and paint-on compositions useful in such methods
JPS4898684A (enExample) * 1972-03-27 1973-12-14
US3834915A (en) * 1972-07-24 1974-09-10 Gte Sylvania Inc Fine grain translucent alumina
US3875277A (en) * 1973-07-30 1975-04-01 Westinghouse Electric Corp Method for making polycrystalline alumina arc tubes

Also Published As

Publication number Publication date
NL176772B (nl) 1985-01-02
NL7602507A (nl) 1976-09-21
FR2304589B1 (enExample) 1979-09-21
DE2609974A1 (de) 1976-09-23
FR2304589A1 (fr) 1976-10-15
NL176772C (nl) 1985-06-03
US4264541A (en) 1981-04-28
DE2609974B2 (de) 1978-02-16
SU651686A3 (ru) 1979-03-05
JPS51107683A (en) 1976-09-24
DE2609974C3 (de) 1978-10-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee