| 摘要 |
PROBLEM TO BE SOLVED: To obtain a dielectric porcelain composition having a high relative dielectric constant εr , in which a temperature factor τf of a resonance frequency is as close to zero as possible and having great Q×f value, and furthermore which can be simultaneously sintered even if low melting temperature Au, Ag, Cu and their alloy or the like are used for an inner electrode material. SOLUTION: The objective composition is expressed by the formula aBiO3/2 -b(Sr1-x-y Mgx Bay )O-cNbO5/2 (wherein unit of (a), (b) and (c) is mol.%) and is in a range of 41.0<=a<=51.0, 17.0<=b<=25.0, 29.0<=c<=39.0 (a+b+c=100 mol.%), 0<=x<=0.4 and 0<=y<=0.4. At least one oxide selected from B2 O3 , SiO2 , GeO2 and SnO2 is preferably added <=2.0 pts.wt. to the dielectric porcelain component. |
