PURPOSE: To obtain temperature compensating dielectric porcelain composition whose main component is represented y a formula, aCaNb2 O6-bZnNb2O5-cZNO- dCaTiO3, where cheap metal can be used as inner electrode material.
CONSTITUTION: CaCo3, ZnO, Nb2O5, and TiO2 are weighed corresponding to compositions, mixed by a hot-type ball mill, the dried up, and calcined for the formation of main raw material. The obtained material serves as temperature compensating dielectric magnetic composition whose main component is represented by a formula, ACaNb2O6-bZnNb2O5-cZNO-dCaTiO3. In the formula, a, b, c, and d are molar fractions and so set as to satisfy formulas, 0.10≤a≤0.60, 0.05≤b≤0.60, 0.15≤c≤0.75, 0.01≤d≤0.2, and a+b+c+d=1. By this setup, a temperature compensating porcelain capacitor, whose electrostatic capacity has the absolute value of temperature coefficient below 60ppm/°C and which is below 0.2% in dielectric loss tan δ and above 1×1013Ωcm in resistivity at a temperature of 20°C, can be obtained.
YONEDA YASUNOBU
SAKABE YUKIO
