US Patent Application 18246730. METHOD FOR MANUFACTURING FLUORINE-CONTAINING SILICA GLASS simplified abstract

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METHOD FOR MANUFACTURING FLUORINE-CONTAINING SILICA GLASS

Organization Name

SUMITOMO ELECTRIC INDUSTRIES, LTD.

Inventor(s)

Tetsuya Haruna of Osaka-shi, Osaka (JP)

Shinji Ishikawa of Osaka-shi, Osaka (JP)

Keisei Morita of Osaka-shi, Osaka (JP)

Tatsuro Hasegawa of Osaka-shi, Osaka (JP)

Seiji Arakawa of Osaka-shi, Osaka (JP)

METHOD FOR MANUFACTURING FLUORINE-CONTAINING SILICA GLASS - A simplified explanation of the abstract

This abstract first appeared for US patent application 18246730 titled 'METHOD FOR MANUFACTURING FLUORINE-CONTAINING SILICA GLASS

Simplified Explanation

The patent application describes a method for producing a fluorine-containing silica glass.

  • The method involves degassing the inside of a furnace core tube under reduced pressure while heating it.
  • A porous silica glass body is inserted into the furnace core tube in an airtight container.
  • A fluorine compound gas is supplied into the furnace core tube under reduced pressure.
  • The porous silica glass body is heat-treated under reduced pressure while the fluorine compound gas is supplied, and gas is discharged from the furnace core tube.
  • The heat treatment is carried out at a temperature higher than the temperatures in the degassing and fluorine adding processes.
  • The end result is a transparent vitrified fluorine-containing silica glass.


Original Abstract Submitted

A method for producing a fluorine-containing silica glass includes degassing which includes degassing an inside of a furnace core tube under reduced pressure while heating the inside of the furnace core tube, after inserting a porous silica glass body into the furnace core tube provided in an airtight container, supplying which includes degassing a fluorine compound gas into the furnace core tube under reduced pressure, fluorine adding which includes heat-treating the porous silica glass body under reduced pressure while supplying the fluorine compound gas into the furnace core tube and discharging a gas from the furnace core tube, and transparent vitrifying which includes heat-treating in a reduced pressure at a temperature higher than temperatures in the degassing process and the fluorine adding process.

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