Microwave dielectric ceramic composition
US5320991A · kind A · utility
4Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1993 |
| Grant date | Jun 14, 1994 |
| Priority date | — |
| Expiry date | Jul 12, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/3296
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention is characterized in that in order to obtain a microwave dielectric ceramic composition having a high dielectric constant (.epsilon.) and a large Q value and having a temperature coefficient (.tau.f) which is close to zero, calcium oxide and strontium oxide, sodium oxide or lead oxide which are mixed with each other in an adjusted ratio are added to lithium oxide, samarium oxide and titanium oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.