Dielectric ceramic composition of BaO, TiO.sub.2,Nd.sub.2 O.sub.3, Sm.sub.2 .sub.3 and Al.sub.2 O.sub.3
US5182240A · kind A · utility
6Cited by
2References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1991 |
| Grant date | Jan 26, 1993 |
| Priority date | — |
| Expiry date | Aug 15, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/4686
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dielectric ceramic composition is disclosed which consists principally of: barium oxide, titanium oxide, neodymium oxide and samarium oxide as major components which are represented by the following formula xBaO - yTiO.sub.2 - z[(1 - a)Nd.sub.2 O.sub.3 - aSm.sub.2 O.sub.3 ], where 0.10.ltoreq.x.ltoreq.0.20, 0.60.ltoreq.y.ltoreq.0.75, 0.10.ltoreq.z.ltoreq.0.25, x+y+z=1, and 0<a.ltoreq.0.50; and not larger than 2.5 parts by weight of alumina per 100 parts by weight of a total amount of the major components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.