JPS6465768A - Ceramic discharge lamp - Google Patents

Ceramic discharge lamp

Info

Publication number
JPS6465768A
JPS6465768A JP22031387A JP22031387A JPS6465768A JP S6465768 A JPS6465768 A JP S6465768A JP 22031387 A JP22031387 A JP 22031387A JP 22031387 A JP22031387 A JP 22031387A JP S6465768 A JPS6465768 A JP S6465768A
Authority
JP
Japan
Prior art keywords
blocking member
electrode
fixing part
externally introduced
coefficient
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.)
Pending
Application number
JP22031387A
Other languages
Japanese (ja)
Inventor
Atsushi Saida
Toshihiko Ishigami
Kazuhiko Yoshikawa
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP22031387A priority Critical patent/JPS6465768A/en
Publication of JPS6465768A publication Critical patent/JPS6465768A/en
Pending legal-status Critical Current

Links

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

PURPOSE:To prevent a blocking member made of conductive ceramic from destruction due to thermal stress by forming the blocking member with a coefficient of thermal expansion near that of an electrode and an external introduced member, which are supported by the blocking member. CONSTITUTION:The open end of a light emitting bulb 1 made of transparent ceramic is blocked with a blocking member made of conductive ceramic, which is formed from an electrode fixing part 2a to support a W electrode shaft 4a in the bulb and an externally introduced member fixing part 2b to fix an externally introduced member 5 made of niobium, wherein the two fixing parts 2a, 2b are made with a coefficient of thermal expansion of the electrode shaft 4a and the externally introduced member 5, respectively, which are borne by them 2a, 2b. For ex. the electrode fixing part 2a is prepared by compressive molding of W powder and alumina grains while the externally introduced member fixing part 2b by compressive molding of niobium powder and alumina grains, and the two moldings are put in contact with each other and baked to accomplish a consolidated blocking member.
JP22031387A 1987-09-04 1987-09-04 Ceramic discharge lamp Pending JPS6465768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22031387A JPS6465768A (en) 1987-09-04 1987-09-04 Ceramic discharge lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22031387A JPS6465768A (en) 1987-09-04 1987-09-04 Ceramic discharge lamp

Publications (1)

Publication Number Publication Date
JPS6465768A true JPS6465768A (en) 1989-03-13

Family

ID=16749184

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22031387A Pending JPS6465768A (en) 1987-09-04 1987-09-04 Ceramic discharge lamp

Country Status (1)

Country Link
JP (1) JPS6465768A (en)

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