| 简介 |
PROBLEM TO BE SOLVED : To provide a dielectric ceramic composition having a specific dielectric constant εr of ≥200, a temperature characteristic τε of the dielectric constant of ≤200 ppm/K, and an excellent Q characteristic. SOLUTION : In manufacturing a dielectric ceramic composition having a basic compositional component represented by aMO-bLiO1/2-cBiO3/2-dREO3/2-eTiO2[wherein M is at least one kind selected from Ba, Sr, Ca and Mg; RE is at least one kind selected from rare-earth elements; a+b+c+d+e=100(mol%); 10≤a≤25; 10≤b≤20; 8≤c≤15; 2≤d≤10; 50≤e≤60; and 0.65≤b/(c+d)≤1.0], the ceramic composition is sintered in an oxygen atmosphere having a higher oxygen concentration than that of the ambient air. Alternatively, the sintered compact can be annealed in an oxygen atmosphere having a higher oxygen concentration than that of the ambient air. The oxygen concentration of the atmosphere of high oxygen concentration is preferably 25% or more. COPYRIGHT : (C)2007, JPO&INPIT |
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