Dielectric ceramic composition

Details Dielectric ceramic composition Dielectric ceramic composition

1997-07-24

1998-06-09

Brunsman, David

Compositions: ceramic

Ceramic compositions

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

C04B 35495, C04B 35453

Patent

active

057633460

ABSTRACT:
Disclosed is a dielectric ceramic composition consisting essentially of a main component of (Sr.sub.1-x K.sub.X).sub.2 (Na.sub.1-x Bi.sub.x)Nb.sub.5 O.sub.15 with x being from about 0.1 to 0.35, and containing at least one of Cr, Mn, Fe, Co and Ni in an amount of from about 0.02 to 2.0% by weight relative to the main component and in terms of CrO.sub.2, MnO.sub.2, Fe.sub.2 O.sub.3, CoO and NiO. The composition contains neither Pb nor Ba, but has a specific inductive capacity comparable to that of BaTiO.sub.3 -type dielectric materials. The temperature-dependent variation in the specific inductive capacity of the composition is low. The composition is suitable for use in capacitors.

REFERENCES:
patent: 4978646 (1990-12-01), Bardhan et al.
patent: 5273944 (1993-12-01), Kagata et al.
patent: 5457076 (1995-10-01), Katagiri et al.

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