JPS5532339A - Manufacturing luminous tube for high pressure alkali metal vapour discharge lamp - Google Patents

Manufacturing luminous tube for high pressure alkali metal vapour discharge lamp

Info

Publication number
JPS5532339A
JPS5532339A JP10509878A JP10509878A JPS5532339A JP S5532339 A JPS5532339 A JP S5532339A JP 10509878 A JP10509878 A JP 10509878A JP 10509878 A JP10509878 A JP 10509878A JP S5532339 A JPS5532339 A JP S5532339A
Authority
JP
Japan
Prior art keywords
grinding
tube
particles
alumina
ceramic tube
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
JP10509878A
Other languages
Japanese (ja)
Inventor
Katsuya Otani
Norihiko Tanaka
Kanji Soma
Ryo Suzuki
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP10509878A priority Critical patent/JPS5532339A/en
Publication of JPS5532339A publication Critical patent/JPS5532339A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

PURPOSE:To provide a durable discharge lamp of high transmittance by preventing cracking of ceramic tube sealing part by grinding both ends of a light transmittable alumina ceramic tube made of alumina particles of a specific size by abrasive particles of a specific size. CONSTITUTION:A luminous tube is prepared by grinding the internal and/or external surface of both ends of a light transmittable alumina ceramic tube 2 made of alumina particles of mean diameter over 80mu by abrasive particles of diameters less than 70mu. For example, the internal surface of both ends of an alumina ceramic tube 2 which is prepared from alumina particles of a larger mean particle size and thus provided with improved transmittance is ground by conical grinding face 13 of a grinding tool 12 having diamond grinding particles smaller than 70mu to form ground face 14, thus cracks and microcracks produced in cutting the tube are removed so that faulty sealing due to cracks is prevented providing durable discharge tube of a high transmittance.
JP10509878A 1978-08-29 1978-08-29 Manufacturing luminous tube for high pressure alkali metal vapour discharge lamp Pending JPS5532339A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10509878A JPS5532339A (en) 1978-08-29 1978-08-29 Manufacturing luminous tube for high pressure alkali metal vapour discharge lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10509878A JPS5532339A (en) 1978-08-29 1978-08-29 Manufacturing luminous tube for high pressure alkali metal vapour discharge lamp

Publications (1)

Publication Number Publication Date
JPS5532339A true JPS5532339A (en) 1980-03-07

Family

ID=14398415

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10509878A Pending JPS5532339A (en) 1978-08-29 1978-08-29 Manufacturing luminous tube for high pressure alkali metal vapour discharge lamp

Country Status (1)

Country Link
JP (1) JPS5532339A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0333455A2 (en) * 1988-03-16 1989-09-20 Ngk Insulators, Ltd. Ceramic envelope device for high-pressure discharge lamp, and method for producing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0333455A2 (en) * 1988-03-16 1989-09-20 Ngk Insulators, Ltd. Ceramic envelope device for high-pressure discharge lamp, and method for producing the same

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