Dielectric ceramic composition

Details Dielectric ceramic composition Dielectric ceramic composition

1997-03-26

1998-06-02

Jones, Deborah

Compositions: ceramic

Ceramic compositions

Titanate, zirconate, stannate, niobate, or tantalate or...

C04B 35472

Patent

active

057599343

ABSTRACT:
Disclosed herein is a dielectric ceramic composition based on a lead-based perovskite-type complex compound containing nickel, characterized in that the amount of nickel is smaller than the stoichiometric amount. The dielectric ceramic composition can contain .alpha. mol % (0<.alpha..ltoreq.100) of lead-based perovskite-type complex compound represented by the formula below O.sub.3
where A denotes at least one element selected from elements having a valance of +5, D denotes at least one element selected from elements having a valance of +6, 0<x<1, 0<y<1, and 0.ltoreq.a.ltoreq.1, with the amount of nickel being .gamma. mol % (0<.gamma..ltoreq.20) which is smaller than the stoichiometric amount (where .gamma.=.alpha..times.(a.times.x.times.1/3+(1-a).times.y.times.1/2)). The dielectric ceramics composition which has a high dielectric constant and yet has nearly constant capacity-temperature characteristics.

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patent: 5668071 (1997-09-01), Kashiwaya et al.
Database--Derwent Publications Ltd., AN 88-009889, & JP 62 272 403, Nov. 26, 1987, Abstract.
Database--Derwent Publications Ltd., AN 86-223085, & JP 61 155 246, Jul. 14, 1986, Abstract.

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