| 摘要 |
<p>[Problem] To provide, using a material which does not contain any rare earth element, a dielectric ceramic which exhibits a relative permittivity (er) of 40 to 46 and an enhanced Qf value; and to provide a dielectric filter provided with the same. [Solution] A dielectric ceramic comprising a sintered body such that when the composition is represented by the compositional formula aZrO2·ßTiO2· ?ZnO·dNb2O5, the molar ratios a, ß, ? and d satisfy 0.3000=a=0.5500, 0.3300=ß=0.6000, 0.0108=?=0.0717, 0.0193 =d=0.1283, a+ß+?+d=1, and 0.5<?/d=1, wherein areas having Zn concentrations of 5% or more occupy at least some of the surface of the sintered body.</p> |
