| 摘要 |
PURPOSE:To provide a ceramic composition having high dielectric constant and excellent insulation and small temperature change rate of permittivity by making BaTiO3 contain RE2O3, MnO, and MgO at specified mol ratios. CONSTITUTION:In a reducing dielectric magnetic composition, the composition by the mol rate of metallic elements is put in the range being expressed by the formula: 100BaTiO3+aREO3+bMnO+cMgO. Among the formula, RE is at least one kind among Ho, Er, and Yb, and a, b, and c are ones which fulfill 0.25<=a<3.00, 0<=b<8.00, 1.00<=c<9.00, 1.00<=b+c<=11.20, 1.00<=c/a<=11.0. This composition shows excellent properties in dielectric constant, dielectric loss constant, insulation loss, and temperature property rate of dielectric constant, even if it is baked on condition that the partial pressure of oxygen is not more than the balanced oxygen partial pressure of Ni/NiO, within the range of 1150-1350 deg.C. This is sintered as a metallic film without a porcelain being reduced, and without base metal particles such as nickel, etc., used as an inner electrode being oxidized, either. |
