Ceramic materials of improved dielectric constants, and capacitors fabricated therefrom

Abstract

A dielectric ceramic composition consists essentially of 100 mole parts of a major ingredient expressed by the formula, (Ba.sub.1-x Ca.sub.x)(Ti.sub.1-y Zr.sub.y)O.sub.3, where x is a numeral in the range of 0.01 to 0.10, and y is a numeral in the range of 0.10 to 0.24. To this major ingredient there are added from 0.10 to 2.0 mole parts of an erbium compound, and from 0.03 to 0.30 mole part of a manganese compound. Optionally, for the provision of low temperature sinterable ceramic compositions, there are also added from 0.03 to 0.40 mole part of a zinc compound and from 0.01 to 0.20 mole part of a silicon compound. Monolithic, solid dielectric capacitors are also disclosed which have ceramic bodies formulated from the above compositions.

Dependencies are inferred from the claim text.