Glass and glass-ceramic sealant compositions
US7399720B1 · kind B1 · utility
12Cited by
2References
6Claims
0Family size
Inventors
Key dates
| Filing date | Oct 15, 2004 |
| Grant date | Jul 15, 2008 |
| Priority date | — |
| Expiry date | Apr 16, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4911
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A glass composition for use as a sealant or otherwise bonded to a fuel cell component, including from about 40 mol % to about 60 mol % RO; from about 2 mol % to about 10 mol % M2O3; and from about 35 mol % to about 45 mol % SiO2. R is selected from the group including strontium, calcium, magnesium and zinc and combinations thereof. M is selected from the group including aluminum, boron, lanthanum, iron and combinations thereof. The glass includes at least about 5 mol % ZnO. Upon heat treatment, the glass at least partially crystallizes with the formation of at least one alkaline earth-zinc pyrosilicate crystalline phases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.