Bismuth-containing lead-free glass enamels and glazes of low silica content
US5252521A · kind A · utility
51Cited by
19References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1992 |
| Grant date | Oct 12, 1993 |
| Priority date | — |
| Expiry date | Oct 19, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C8/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This invention relates to a lead-free glass coating made by firing a lead-free glass composition comprising in weight percent from about 35% to about 77% of bismuth oxide, from about 10% to about 33% of boron oxide, and from about 10% to about 32% of zinc oxide at a temperature sufficient to fuse and cure the glass composition. The invention also relates to lead-free glazes and enamels that exhibit excellent acid resistance, possess low coefficients of linear or thermal expansion, and moderate maturation temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.