Ceramic composition

Details Ceramic composition Ceramic composition

1992-04-09

1994-01-04

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

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

501135, C04B 3546

Patent

active

052759881

ABSTRACT:
A ceramic composition is herein disclosed, which is a lead-type perovskite compound capable of being subjected to low temperature-sintering among ceramic compositions for use in making capacitors, which has a high dielectric constant at room temperature of not less than 10000, a low temperature-dependency of the dielectric constant and a low decrease in capacitance upon application of a DC bias and which comprises, as a main constituent, a ternary system comprising lead magnesium niobate: [Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3 ], lead nickel niobate: [Pb(Ni.sub.1/3 Nb.sub.2/3)O.sub.3 ] and lead titanate: [PbTiO.sub.3 ] in which part of the Pb.sup.2+ ions present in the ternary system are substituted with a desired amount of Sr.sup.2+ ions, Ba.sup.2+ ions or Ca.sup.2+ ions.

REFERENCES:
patent: 4712156 (1987-12-01), Bardham
patent: 4751209 (1988-06-01), Yokotani et al.

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