Glass production method

Patent metadata

Field	Value
Publication number	US-12448312-B2
Application number	US-202218285773-A
Country	US
Kind code	B2
Filing date	Mar 22, 2022
Priority date	Apr 7, 2021
Publication date	Oct 21, 2025
Grant date	Oct 21, 2025

Abstract

Provided is a glass production method with which oxidation can be suppressed and productivity can be increased. A glass production method according to the present invention includes the steps of: turning a raw material 6 placed in a container 1 into a melt 11 ; homogenizing the melt 11 ; removing a gas from the melt 11 , wherein at least one of the step of turning the raw material 6 into the melt 11 and the step of homogenizing the melt 11 is performed in an atmosphere of an inert gas or a reducing gas, and in the step of the removing the gas from the melt 11 , the inert gas or the reducing gas is removed by setting the temperature of the melt 11 to be lower than the temperature in the step of homogenizing the melt 11.

First claim

The invention claimed is:

1. A glass production method comprising the steps of:
turning a raw material placed in a container into a melt;
homogenizing the melt; and
removing a gas from the melt,
heating the melt and discharging the melt from the container after the step of removing the gas from the melt, wherein
at least one of the step of turning the raw material into the melt and the step of homogenizing the melt is performed in an atmosphere of an inert gas or a reducing gas,
in the step of removing the gas from the melt, the inert gas or the reducing gas is removed by setting the temperature of the melt to be lower than the temperature in the step of homogenizing the melt,
the at least one of the step of turning the raw material into the melt and the step of homogenizing the melt is performed in an atmosphere of one of the inert gas and the reducing gas,
the step of discharging the melt from the container is performed in an atmosphere of the other of the inert gas and the reducing gas in the container, and
the glass is chalcogenide glass.

2. The glass production method according to claim 1 , wherein in the step of removing the gas from the melt, pressure in the container is reduced.

3. The glass production method according to claim 1 , wherein both the steps of the turning the raw material into the melt and the homogenizing the melt are performed in the atmosphere of the inert gas or the reducing gas.

Assignees

• Nippon Electric Glass Co

Inventors

• Ito Nobutoshi
• Nakatsuka Kazuto
• Kagai Tsubasa

Classifications

• C03B5/021 Primary

  by induction heating · CPC title

• Y02P40/57

  Improving the yield, e-g- reduction of reject rates · CPC title

• C03B2201/88

  Chalcohalide glasses, i.e. containing one or more of S, Se, Te and one or more of F, Cl, Br, I · CPC title

• C03B5/26

  Outlets {, e.g. drains, siphons}; Overflows {, e.g. for supplying the float tank, tweels} · CPC title

• C03B5/16

  Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces · CPC title