Nonreducible dielectric ceramic composition
US6790801B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2002 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Dec 24, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2237/704
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a nonreducible dielectric composition. Provided is a highly reliable TC based dielectric composition prepared by adding a sintering additive having excellent qualities to a conventional (Ca1-xSrx)m(Zr1-yTiy)O3 based dielectric composition, so that it can be sintered under a reducing atmosphere to be used in formation of a nickel electrode, can be sintered at a low temperature of less than 1,250° C., and has a small dielectric loss and a high resistivity. The composition of the present invention includes a nonreducible dielectric composition comprising a main component expressed by the general formula, (Ca1-xSrx)m(Zr1-yTiy)O3, which has the ranges of 0≦x≦1, 0.09≦y≦0.35, and 0.7≦m≦1.05; and 0.5-10 wt % of a minor component expressed by the general formula, aMnO-bSiO2-dR1O-eR2O2 (a+b+d+e=100, R1 is at least one element selected from the group consisting of Mg, Ca, Sr and Ba, and R2 is at least one element of Zr and Ti), which has the ranges of 20≦a≦60, 10≦b≦65, and 0≦(d+e)≦65.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.