Sealing glass for the production of glass-to-metal seals
US5137849A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1990 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Oct 22, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A sealing glass is provided for the production of glass-to-metal seals, especially for battery headers, in storage batteries having a lithium electrode. The constituents of the glass, expressed in % by weight on an oxide basis, comprise: ______________________________________ 16-25 SiO.sub.2 0-8 Li.sub.2 O 0-4 MgO 20-35 B.sub.2 O.sub.3 0-5 Na.sub.2 O 5-12 CaO 15-24 Al.sub.2 O.sub.3 0-10 K.sub.2 O 10-30 BaO + SrO 4-15 .SIGMA. alkali oxide 0-5 ZnO 15-40 .SIGMA. alkaline- earth oxide + ZnO ______________________________________ The coefficient of thermal expansion of the glass is closely matched to the metals in the cell housing. This glass also has a good welding strength and corrosion resistance, as well as satisfactory hydrolytic resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.