| 摘要 |
Provided is a dielectric ceramics having crystals of a composition formula: aBaO.bCoO.cZnO.dNb2O5 wherein coefficients a, b, c and d satisfy 0.498≦̸a<0.500, 0.066≦̸b≦̸0.132, 0.033≦̸c≦̸0.099, and 0.335≦̸d≦̸0.338. Provided is a dielectric ceramics having crystals composed of BaO, CoO, ZnO, and Nb2O5, wherein a peak strength ratio IA/IB between a crystal peak IA existing in the vicinity of 2&thetas;=18° and a crystal peak IB existing in the vicinity of 2&thetas;=31° in an X-ray diffraction chart is 0.003 or more. Provided is a resonator using the dielectric ceramics as a dielectric body.
|
