Opaque quartz glass and method of manufacturing the same
US12006242B2 · kind B2 · utility
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5Claims
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Key dates
| Filing date | Jun 3, 2019 |
| Grant date | Jun 11, 2024 |
| Priority date | — |
| Expiry date | Feb 17, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/57
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A large sized opaque quartz glass ingot having an excellent heat ray shielding property, an outstanding light blocking property, high mechanical strength and small roughness of a baked finished smooth surface.The shape of bubbles inside the quartz glass are almost complete spheres and the average particle size of the bubbles is 1 μm or less, such that the strength of the opaque quartz glass ingot is increased as the stress concentration at the edges of the bubbles is eliminated and an increase of surface roughness caused by baking is alleviated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.