JPS5722128A - Production of optical glass - Google Patents

Production of optical glass

Info

Publication number
JPS5722128A
JPS5722128A JP9575680A JP9575680A JPS5722128A JP S5722128 A JPS5722128 A JP S5722128A JP 9575680 A JP9575680 A JP 9575680A JP 9575680 A JP9575680 A JP 9575680A JP S5722128 A JPS5722128 A JP S5722128A
Authority
JP
Japan
Prior art keywords
chlorine
gel
optical glass
sintered
containing atmosphere
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
JP9575680A
Other languages
Japanese (ja)
Other versions
JPS599498B2 (en
Inventor
Makoto Sato
Kenzo Susa
Iwao Matsuyama
Yasuo Suganuma
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.)
Hitachi Ltd
Original Assignee
Hitachi 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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9575680A priority Critical patent/JPS599498B2/en
Publication of JPS5722128A publication Critical patent/JPS5722128A/en
Publication of JPS599498B2 publication Critical patent/JPS599498B2/en
Expired 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
    • C03B19/12—Other methods of shaping glass by liquid-phase reaction processes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Melting And Manufacturing (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Glass Compositions (AREA)
  • Silicon Compounds (AREA)

Abstract

PURPOSE:A porous gel prepared by hydrolysis of a metal alkoxide is partially sintered first, then heated in an atmosphere containing chlorine at a temperature lower than the above one and sintered at a temperature higher than that of chlorine treatment to produce the objective optical glass of greatly reduced chlorine content. CONSTITUTION:After gelation of a mixture of a metal alkoxide such as Si(OCH3)4, methanol and water, the remaining water and methanol are distilled off to form a gel of, e.g., a cylinder. The gel is partially sintered in a helium-containing atmosphere, then heat treated in a chlorine-containing atmosphere at a temperature lower than that of the partial sintering, 400-1,000 deg.C, e.g., at 800 deg.C. Then, the heat treated gel is additionally sintered in a helium-containing atmosphere at a temperature higher than that of the chlorine treatment. The amounts of hydroxyls and chlorine in the resultant optical glass reduces so that foaming is prevented on sintering.
JP9575680A 1980-07-15 1980-07-15 Optical glass manufacturing method Expired JPS599498B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9575680A JPS599498B2 (en) 1980-07-15 1980-07-15 Optical glass manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9575680A JPS599498B2 (en) 1980-07-15 1980-07-15 Optical glass manufacturing method

Publications (2)

Publication Number Publication Date
JPS5722128A true JPS5722128A (en) 1982-02-05
JPS599498B2 JPS599498B2 (en) 1984-03-02

Family

ID=14146332

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9575680A Expired JPS599498B2 (en) 1980-07-15 1980-07-15 Optical glass manufacturing method

Country Status (1)

Country Link
JP (1) JPS599498B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59107937A (en) * 1982-12-10 1984-06-22 Seiko Epson Corp Manufacture of quartz glass
JPS59116134A (en) * 1982-12-23 1984-07-04 Seiko Epson Corp Manufacture of quartz glass
JPS6191021A (en) * 1984-09-20 1986-05-09 Seiko Epson Corp Production of quartz glass
US6732549B1 (en) * 2000-08-01 2004-05-11 Lucent Technologies Inc. Multi-pass sintering of a sol-gel body through a hot zone

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59107937A (en) * 1982-12-10 1984-06-22 Seiko Epson Corp Manufacture of quartz glass
JPS59116134A (en) * 1982-12-23 1984-07-04 Seiko Epson Corp Manufacture of quartz glass
JPS64330B2 (en) * 1982-12-23 1989-01-06 Seiko Epson Corp
JPS6191021A (en) * 1984-09-20 1986-05-09 Seiko Epson Corp Production of quartz glass
JPH0142896B2 (en) * 1984-09-20 1989-09-18 Seiko Epson Corp
US6732549B1 (en) * 2000-08-01 2004-05-11 Lucent Technologies Inc. Multi-pass sintering of a sol-gel body through a hot zone

Also Published As

Publication number Publication date
JPS599498B2 (en) 1984-03-02

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