| 摘要 |
PURPOSE: To provide a material suitable for a dielectric resonator and the like by containing glass powder composed of PbO, ZnO and B2 O3 , and GeO2 of respective specified percentages by weight as accessory constituents in a dielectric porcelain composition whose main constituent is expressed by a formula. CONSTITUTION: The contents of accessory constituents, glass powder and GeO2 against a main constituent, (a) and (b) (percentages by weight) are set to 1<=a<=25, 0.5<=b<=10 respectively. Barium carbonate, titanium oxide, neodymium oxide and samarium oxide of respective predetermined amounts are wet-blended. Thereafter, solution is removed and the same is calcined in an air atmosphere at 1000 to 1300 deg.C for 1 to 5 hours. After the glass powder and the GeO2 are wet-blended with this calcined powder and is ground, the solution is removed and the same is uniformly blended with an organic binder. After drying, grinding, and press-forming, the same is burnt in an oxygen containing gas atmosphere at 850 to 1100 deg.C so as to obtain a porcelain composition which has a high dielectric constant, a large no-load Q and small temperature change of a resonant frequency. |
