Glass compositions with low dielectric losses
US4609632A · kind A · utility
1Cited by
2References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 14, 1985 |
| Grant date | Sep 2, 1986 |
| Priority date | — |
| Expiry date | Aug 14, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C3/118
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Alkali-free glasses with low dielectric losses, thermal expansion coefficients of 3.15 to 4.97.times.10.sup.-6 /.degree.C. in the temperature range from 20.degree. to 300.degree. C., adequate acid resistance, dielectric loss factors tan .delta. of 3.94 to 24.9.times.10.sup.-4 and processing temperatures (V.sub.A) of 1132.degree. to 1280.degree. C., have the following composition (in weight percent): 52.50-60.20 SiO.sub.2, 2.80-3.80 B.sub.2 O.sub.3, 8-14 Al.sub.2 O.sub.3, 6.0-20.20 PbO, 2.0-13.5 CaO, 0-3.5 MgO, 0-8 ZnO, 0-4.7 BaO, .SIGMA.PbO, CaO, MgO, ZnO, BaO 21.10-34.0, 0-1.0 F, 0.20-0.50 Sb.sub.2 O.sub.3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.