Dielectric ceramic composition
US5013695A · kind A · utility
4Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 1989 |
| Grant date | May 7, 1991 |
| Priority date | — |
| Expiry date | May 22, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P7/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A dielectric ceramic composition consisting essentially of barium oxide, titanium oxide, neodymium oxide and gadolinium oxide and which is expressed by the formula: EQU aBaO-bTiO.sub.2 -c[(1-X)Nd.sub.2 O.sub.3 -XGd.sub.2 O.sub.3 ] wherein, 0.10.ltoreq.a.ltoreq.0.20, 0.65.ltoreq.b.ltoreq.0.75, 0.10.ltoreq.c.ltoreq.0.20, a+b+c=1 (a, b, and c are mole fractions), and O<X.ltoreq.0.4 (X is a mole fraction of Gd.sub.2 O.sub.3 based on the total amount of Nd.sub.2 O.sub.3 and Gd.sub.2 O.sub.3). Al.sub.2 O.sub.3 may be added in an amount of not more than 4 parts by weight to 100 parts by weight of the dielectric ceramic composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.