JPS6424038A - Production of opaque glass preform - Google Patents

Production of opaque glass preform

Info

Publication number
JPS6424038A
JPS6424038A JP17902087A JP17902087A JPS6424038A JP S6424038 A JPS6424038 A JP S6424038A JP 17902087 A JP17902087 A JP 17902087A JP 17902087 A JP17902087 A JP 17902087A JP S6424038 A JPS6424038 A JP S6424038A
Authority
JP
Japan
Prior art keywords
glass preform
contg
core tube
heating
porous glass
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
JP17902087A
Other languages
Japanese (ja)
Other versions
JP2640745B2 (en
Inventor
Ryozo Yamauchi
Yoshiya Isono
Koji Kosaka
Nobuyasu Sato
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.)
Fujikura Ltd
Original Assignee
Fujikura 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 Fujikura Ltd filed Critical Fujikura Ltd
Priority to JP62179020A priority Critical patent/JP2640745B2/en
Publication of JPS6424038A publication Critical patent/JPS6424038A/en
Application granted granted Critical
Publication of JP2640745B2 publication Critical patent/JP2640745B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C03B37/01446—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Thermal Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Melting And Manufacturing (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

PURPOSE:To produce the title opaque glass preform reed of impurities, contg. closed cells, and easy to handle at a low cost by heating a porous glass preform in a furnace core tube to reduce its volume. CONSTITUTION:A sol is formed as a glass forming precursor by hydrolyzing a metal alkoxide, and the sol is dried to obtain fine glass particles. The fine glass particles are collected to obtain a porous glass preform. The porous glass preform 4 is heat-treated, as required, in a dehydrating gas atmosphere, then placed in the quartz furnace core tube 2 through a carrier 6, and heated by a heating furnace 1. The heating is preferably carried out in the atmosphere of the gaseous He or halogen-contg. dehydrating gas introduced from an opening 3. By this method, the volume of the porous glass preform 4 can be reduced at a relatively low temp. without damaging the furnace core tube 2, and an opaque glass preform 5 contg. closed cells and difficult to break is formed.
JP62179020A 1987-07-20 1987-07-20 Method for manufacturing opaque glass preform Expired - Fee Related JP2640745B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62179020A JP2640745B2 (en) 1987-07-20 1987-07-20 Method for manufacturing opaque glass preform

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62179020A JP2640745B2 (en) 1987-07-20 1987-07-20 Method for manufacturing opaque glass preform

Publications (2)

Publication Number Publication Date
JPS6424038A true JPS6424038A (en) 1989-01-26
JP2640745B2 JP2640745B2 (en) 1997-08-13

Family

ID=16058706

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62179020A Expired - Fee Related JP2640745B2 (en) 1987-07-20 1987-07-20 Method for manufacturing opaque glass preform

Country Status (1)

Country Link
JP (1) JP2640745B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05170473A (en) * 1991-12-18 1993-07-09 Shin Etsu Chem Co Ltd Production of preform for optical fiber
US7295832B2 (en) 2002-05-31 2007-11-13 Infineon Technologies Ag Authorization means security module terminal system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6172644A (en) * 1984-09-19 1986-04-14 Sumitomo Electric Ind Ltd Manufacture of optical fiber having low transmission loss

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6172644A (en) * 1984-09-19 1986-04-14 Sumitomo Electric Ind Ltd Manufacture of optical fiber having low transmission loss

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05170473A (en) * 1991-12-18 1993-07-09 Shin Etsu Chem Co Ltd Production of preform for optical fiber
US7295832B2 (en) 2002-05-31 2007-11-13 Infineon Technologies Ag Authorization means security module terminal system

Also Published As

Publication number Publication date
JP2640745B2 (en) 1997-08-13

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees