Dielectric ceramic compositions and dielectric resonators

Abstract

The invention provides a dielectric ceramic including as the main component a complex oxide formed of both Zr and Ti, at least one component selected from the group (A) consisting of {Mg, Co, Zn, Ni and Mn} and at least one component selected from the group (B) consisting of {Nb and Ta} and a TE.sub.01 .delta.-mode dielectric resonator including the dielectric ceramic, and also the invention provides a dielectric ceramic composition expressed by Formula (a): xZrO.sub.2 --yTiO.sub.2 --zA.sub.(1+w)/3 Nb.sub.(2-w)/3 O.sub.2Formula (a) wherein A denotes at least one component selected from the group (A) consisting of {Mg, Co, Zn, Ni and Mn}, x, y and z denote molar fractions ranging from 0.10 to 0.60, 0.20 to 0.60 and 0.01 to 0.70, respectively, and have the relation represented by Formula (a): x+y+z=1 Formula (a) and w denotes a value of 0 to 1.50, and a TE.sub.01 .delta.-mode dielectric resonator in which using the dielectric ceramic.

Dependencies are inferred from the claim text.