Chemically durable nitrogen containing phosphate glasses useful for sealing to metals
US4455384A · kind A · utility
14Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1982 |
| Grant date | Jun 19, 1984 |
| Priority date | — |
| Expiry date | Dec 8, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C27/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The chemical durability of alkali phosphate glasses is improved by incorporation of up to 23 weight percent of nitrogen. A typical phosphate glass contains: 10 to 60 mole % of Li.sub.2 O, Na.sub.2 O or K.sub.2 O; 5-40 mole % of BaO or CAO; 0-1 to 10 mole % of Al.sub.2 O.sub.3 ; and 40-70 mole % of P.sub.2 O.sub.5. Nitrides, such as AlN, are the favored additives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.