Borosilicate glass
US4870034A · kind A · utility
51Cited by
4References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 5, 1988 |
| Grant date | Sep 26, 1989 |
| Priority date | — |
| Expiry date | Jul 5, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C4/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a borosilicate glass for the manufacturing of laboratory glass, domestic glass, pharmaceutical container glass, lamp glass and X-ray tube glass. The glass has the following composition: PA1 SiO.sub.2 : 74.5 to 76.5% by weight PA1 B.sub.2 O.sub.3 : 10.0 to 12.0% by weight PA1 Al.sub.2 O.sub.3 : 3.5 to 6.0% by weight PA1 Na.sub.2 O: 6.0 to 8.0% by weight PA1 CaO: 1.0 to 2.0% by weight PA1 ZrO.sub.2 : 0 to 0.50% by weight PA1 F: 0 to 1.0% by weight As.sub.2 O.sub.3 and/or Sb.sub.2 O.sub.3 and/or NaCl are used as refining agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.