Dielectric ceramic composition of BaO, TiO.sub.2, Nd.sub.2 O.sub.3, Sm.sub.2 O.sub.3 and Bi.sub.2 O.sub.3
US5185304A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1991 |
| Grant date | Feb 9, 1993 |
| Priority date | — |
| Expiry date | Aug 15, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B3/12
- 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, samarium oxide and bismuth oxide, which are represented by the following formula xBaO--yTiO.sub.2 --z[(1-a-b)Nd.sub.2 O.sub.3 --aSm.sub.2 O.sub.3 --bBi.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.0.24, x+y+z=1, 0<a.ltoreq.0.25 and 0<b.ltoreq.0.30. Also disclosed is a dielectric ceramic composition which consists principally of: barium oxide, titanium oxide, neodymium oxide, samarium oxide and bismuth oxide as major components which are represented by the following formula xBaO--yTiO.sub.2 --z[1-a-b)Nd.sub.2 O.sub.3 -aSm.sub.2 O.sub.3 --bBi.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, 0<a.ltoreq.0.30 and 0<b.ltoreq.0.35; and not more than 2.0 parts by weight of alumina per 100 parts by weight of a total of the major components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.