Neutral gray, low transmittance, nickel-free glass
US5023210A · kind A · utility
66Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1989 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | Nov 3, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S501/905
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A neutral gray, low transmittance (less than 20 percent luminous transmittance) soda-lime-silica glass has reduced solar energy transmittance, and in particular exceptionally low ultraviolet transmittance (less than 20 percent total solar ultraviolet transmittance) when provided with the following colorant constituents: PA0 Fe.sub.2 O.sub.3 (total iron) 0.4-0.7 percent by weight PA0 FeO 0.08-0.15 PA0 Se 0.003-0.008 PA0 CoO 0.003-0.025 PA0 Cr.sub.2 O.sub.3 0.022-0.050 The glass avoids the use of nickel compounds as colorants. Parameters for melting such a glass in a commercial furnace are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.