Narumi China Corporation

Sony Corporation

Tohru Fuwa

Hiroshi Kato

Shinsuke Yano

Susumu Nishigaki

Kanji Murano

Susamu Nishigaki

A dielectric ceramic composition for microwave applications having the formula ##EQU1## wherein x, y and z are molar percentages and 10.ltoreq.x.ltoreq.22, 58.ltoreq.y.ltoreq.80 and 8.ltoreq.z.ltoreq.22, O&lt;n.ltoreq.25, and x+y+z=100;

Dielectric ceramic composition for microwave application

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.

Dielectric ceramic composition

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Tohru Fuwa