US 12,459,850 B2
Glass production method
Kazuto Nakatsuka, Otsu (JP); and Tsubasa Kagai, Otsu (JP)
Assigned to NIPPON ELECTRIC GLASS CO., LTD., Shiga (JP)
Appl. No. 18/035,799
Filed by NIPPON ELECTRIC GLASS CO., LTD., Otsu (JP)
PCT Filed Nov. 10, 2021, PCT No. PCT/JP2021/041266
§ 371(c)(1), (2) Date May 8, 2023,
PCT Pub. No. WO2022/107650, PCT Pub. Date May 27, 2022.
Claims priority of application No. 2020-191564 (JP), filed on Nov. 18, 2020.
Prior Publication US 2023/0406748 A1, Dec. 21, 2023
Int. Cl. C03B 19/02 (2006.01)
CPC C03B 19/02 (2013.01) [C03B 2201/86 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A glass production method comprising:
a step of allowing a melt, which is obtained by melting a glass raw material, to flow into a mold; and
a step of cooling the melt to yield a glass, wherein
the glass is a chalcogenide glass,
a partition member is disposed in the mold, forming an inflow portion surrounded by the mold and the partition member,
the step of allowing the melt to flow into the mold is performed in an air atmosphere, and
in the step of allowing the melt to flow into the mold, and while a heterogeneous layer is allowed to form on a liquid surface of the melt flowing into the inflow portion and the mold is moved relative to the partition member to increase the capacity of the inflow portion, the melt flows between a bottom portion of the inflow portion and the heterogeneous layer.