Narumi China Corporation

Susamu Nishigaki

Hiroshi Kato

Shinsuke Yano

Tohru Fuwa

A dielectric ceramic composition comprising a ternary system composition represented by the formula, aBaO.bTiO.sub.2.cWO.sub.3 (wherein a, b and c are percent molar fractions totaling 100, i.e., a+b+c=100; 17.ltoreq.a.ltoreq.21.5; 75.ltoreq.b.ltoreq.83 and 0.1.ltoreq.c.ltoreq.5) and characterized by an advantageous properties, particularly, high dielectric constant, large Q and small .tau.f. In the compositions, TiO.sub.2 may be partially replaced by ZrO.sub.2 and, optionally, MnO may be also included up to 3 mole percent based on the total molar amount of the foregoing ingredients. The dielectric ceramic compositions are especially, but not exclusively, useful in microwave applications because of the foregoing advantages.

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Nagoya, Japan

Susamu Nishigaki