Reflective member and glass layered member production method

Patent metadata

Field	Value
Publication number	US-12264095-B2
Application number	US-202017642525-A
Country	US
Kind code	B2
Filing date	Aug 17, 2020
Priority date	Sep 13, 2019
Publication date	Apr 1, 2025
Grant date	Apr 1, 2025

Abstract

One aspect is a reflective member, which has a laminated structure in which transparent quartz glass members are formed on an upper surface and a lower surface of an opaque siliceous sintered powder layer. The opaque siliceous sintered powder layer has a thickness of 0.1 mm or more and a thickness distribution of ±0.05 mm or less. When a load is applied to each of the transparent quartz glass members on an upper surface and a lower surface of the laminated structure in a direction parallel to the laminated structure, the reflective member is fractured at a load of 5 N or more per square centimeter. The laminated structure includes a semi-transparent portion having a width of 0.01 mm or less, which has an intermediate opacity between an opacity of the opaque siliceous sintered powder layer and an opacity of each of the transparent quartz glass members.

First claim

The invention claimed is:

1. A reflective member comprising:
a laminated structure in which transparent quartz glass members are formed on an upper surface and a lower surface of an opaque siliceous sintered powder layer,
wherein the opaque siliceous sintered powder layer has a thickness of 0.1 mm or more and a thickness distribution of ±0.05 mm or less,
wherein, when a load is applied to each of the transparent quartz glass members on an upper surface and a lower surface of the laminated structure in a direction parallel to the laminated structure, the reflective member is fractured at a load of 5 N or more per square centimeter, and
wherein the laminated structure includes, in a boundary between the opaque siliceous sintered powder layer and each of the transparent quartz glass members of the laminated structure, a semi-transparent portion having a width of 0.01 mm or less, which has an intermediate opacity between an opacity of the opaque siliceous sintered powder layer and an opacity of each of the transparent quartz glass members.

2. The reflective member according to claim 1 , wherein the reflective member has a reflectance of 60% or more at a wavelength of from 1,000 nm to 2,000 nm.

3. The reflective member according to claim 1 , wherein the siliceous sintered powder layer has a bulk density of from 1.3 g/cm 3 to 1.5 g/cm 3 .

4. The reflective member according to claim 1 ,
wherein the reflective member comprises a plurality of the siliceous sintered powder layers, and
wherein the siliceous sintered powder layers and the quartz glass members are alternately laminated.

Assignees

• Shin Etsu Quartz Prod Co Ltd
• Heraeus Quarzglas

Inventors

• Segawa Toru
• Yamaguchi Kazuhiro
• Watanabe Tomonori
• Fujita Daiki

Classifications

• B32B2307/416

  Reflective · CPC title

• B32B2264/1021

  Silica · CPC title

• B32B2255/20

  Inorganic coating · CPC title

• B32B17/06

  comprising glass as the main or only constituent of a layer, next to another layer of a specific {material} · CPC title

• B32B5/16

  characterised by features of a layer formed of particles, e.g. chips, powder {or granules (layer formed of natural mineral particles B32B19/00; layer being formed of wood fibres, chips or particles B32B21/02)} · CPC title