| 摘要 |
PROBLEM TO BE SOLVED: To provide a dielectric porcelain composition for a high frequency, which has a high relative dielectric constant, high Q value and small temp. dependence of the relative dielectric constant and, further, is capable of maintaining high retentivity of Q-value at 120 deg.C based on the room temp. (25 deg.C), and a dielectric resonator. SOLUTION: The formula, based on molar ratio of metal elements, of the composition of main components is expressed by aLa2O3.bAl2O3.cSrO.dTiO2, wherein a, b, c and d satisfy the following relations; 0.1061<=a<=0.2162, 0.1050<=b<=0.2086, 0.3040<=c<=0.4185, 0.2747<=d<=0.4373, 0.75<=b/a<=1.25, 0.75<=d/c<=1.25 (a+b+c+d=1). The dielectric porcelain composition for a high frequency contains Mn in an amount of 0.01-3.0 parts by weight expressed in term of MnO2 per 100 parts by weight of the composition of the main components. |
