| 摘要 |
PURPOSE:To obtain the title ceramic composition having a small loss and a high dielectric constant and wherein the temp. characteristic of the resonance frequency can be widely changed by incorporating Sm2O3 into a specified composition of TiO2, BaO, and Nd2O3. CONSTITUTION:From 1 to 15wt.% Sm2O3 is incorporated into the composition consisting essentially of TiO2, BaO, and Nd2O3 and having a composition shown by the formula, wherein the component rates (x), (y), and (z) are limited to conform to 0.05<=x<=0.15, 0.50<=y<=0.75, 0.20<=z<=0.35, and (x+y+z)=1, to obtain the ceramic composition. The temp. characteristic of the resonance frequency of the ceramic composition can be changed in the range 0-100ppm/ deg.C by the amt. of Sm2O3 to be added in the frequency region of the microwave. Accordingly, the resonance frequency temp. of the resonator and a dielectric resonator can be easily stabilized when the ceramic composition is used, and a small-sized high-performance microwave circuit can be prepared. |
