Low iron, high redox ratio, and high iron, high redox ratio, soda-lime-silica glasses and methods of making same
US10737970B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2016 |
| Grant date | Aug 11, 2020 |
| Priority date | — |
| Expiry date | Feb 18, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C4/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A glass has a basic soda-lime-silica glass portion, and a colorant portion including total iron as Fe2O3 in the range of greater than zero to 0.10 weight percent, e.g. selected from the group of total iron as Fe2O3 in the range of greater than zero to 0.02 weight percent and total iron as Fe2O3 in the range of greater than 0.02 weight percent to less than 0.10 weight percent; redox ratio in the range of 0.2 to 0.6, and tin and/or tin compounds, e.g. SnO2 greater than 0.000 to 5.0 weight percent. In one embodiment of the invention, the glass has a tin side and an opposite air side, wherein the tin side of the glass is supported on a molten tin bath during forming of the glass. The tin concentration at the tin side of the glass is greater than, less than, or equal to the tin concentration in “body portion” of the glass. The “body portion” of the glass extending from the air side of the glass toward the tin side and terminating short of the tin side of the glass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.