JPS5527803A - Molded glass and production thereof - Google Patents

Molded glass and production thereof

Info

Publication number
JPS5527803A
JPS5527803A JP9661178A JP9661178A JPS5527803A JP S5527803 A JPS5527803 A JP S5527803A JP 9661178 A JP9661178 A JP 9661178A JP 9661178 A JP9661178 A JP 9661178A JP S5527803 A JPS5527803 A JP S5527803A
Authority
JP
Japan
Prior art keywords
glass
degrees
sio
groups
recrushed
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
JP9661178A
Other languages
Japanese (ja)
Other versions
JPS6120490B2 (en
Inventor
Kazuo Nakamura
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.)
Ushio Denki KK
Ushio Inc
Original Assignee
Ushio Denki KK
Ushio Inc
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 Ushio Denki KK, Ushio Inc filed Critical Ushio Denki KK
Priority to JP9661178A priority Critical patent/JPS5527803A/en
Publication of JPS5527803A publication Critical patent/JPS5527803A/en
Publication of JPS6120490B2 publication Critical patent/JPS6120490B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00—Other methods of shaping glass
    • C03B19/06—Other methods of shaping glass by sintering, e.g. by cold isostatic pressing of powders and subsequent sintering, by hot pressing of powders, by sintering slurries or dispersions not undergoing a liquid phase reaction

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Glass Melting And Manufacturing (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

PURPOSE: To cheaply produce molded glass the expansion coefficient of which changes stepwise by subjecting a borosilicate glass gob to phase separating treatment, crushing and acid treatment after which the resulting two or more groups of glass powder with different separate phase elution degrees are washed, precalcined, recrushed, filled into a container in the order of the degrees, and calcined.
CONSTITUTION: Glass raw materials based on Na2O-B2O3-SiO2, K2O-B2O3-SiO2 or Li2O-B2O3-SiO2 are melted in a crucible, converted into glass by rapid cooling, subjected to phase separating treatment at 600W650°C for about 1W2hr, and crushed to below 1mm. To the raw materials may be added Al2O3, CaO, BaO, or MgO. The resulting glass powder is divided into two or more groups, which are treated with acid for different times. The groups with different separate phase elution degrees are then washed, dried, precalcined to contraction, recrushed, filled into a molding container in the order of the degrees, and calcined at about 1200°C.
COPYRIGHT: (C)1980,JPO&Japio
JP9661178A 1978-08-10 1978-08-10 Molded glass and production thereof Granted JPS5527803A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9661178A JPS5527803A (en) 1978-08-10 1978-08-10 Molded glass and production thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9661178A JPS5527803A (en) 1978-08-10 1978-08-10 Molded glass and production thereof

Publications (2)

Publication Number Publication Date
JPS5527803A true JPS5527803A (en) 1980-02-28
JPS6120490B2 JPS6120490B2 (en) 1986-05-22

Family

ID=14169650

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9661178A Granted JPS5527803A (en) 1978-08-10 1978-08-10 Molded glass and production thereof

Country Status (1)

Country Link
JP (1) JPS5527803A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2351603A (en) * 1999-06-28 2001-01-03 Koito Mfg Co Ltd Arc tube for discharge lamp including a residual compressive stress layer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2351603A (en) * 1999-06-28 2001-01-03 Koito Mfg Co Ltd Arc tube for discharge lamp including a residual compressive stress layer
GB2351603B (en) * 1999-06-28 2001-11-14 Koito Mfg Co Ltd Arc tube for discharge lamp
US6452334B1 (en) 1999-06-28 2002-09-17 Koito Manufacturing Co., Ltd. Arc tube with residual-compressive-stress layer for discharge lamp unit and method of manufacturing same
NL1015531C2 (en) * 1999-06-28 2003-12-09 Koito Mfg Co Ltd Arc tube with a layer for residual compressive voltage for a discharge lamp unit and method for manufacturing it.

Also Published As

Publication number Publication date
JPS6120490B2 (en) 1986-05-22

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