| 摘要 |
PURPOSE:To enhance the permittivity of the title porcelain capacitor using the specific compositional range of the fundamental component, consisting of Ba and Mg or Zn and Ti in which porcelain is shown by a specific chemical formula, the first additive substance consisting of Cr2O3 or Al2O3, and the second additive substance consisting of three-component type B2O3, SiO2 and specific metal oxide. CONSTITUTION:The title porcelain capacitor is composed of the fundamental component of porcelain of 100.0 pts.wt., the first additive component of 0.01 to 3.00 pts.wt., and the second additive component of 0.2 to 5.0 pts.wt. The fundamental component consists of (Bak-xMx)OkTiO2 (provided that M contains one or more kinds of metal selected from Mg and Zn, (k indicates the value within the range of 1.00 to 1.05, and (x) indicates the value within the range of 0.01 to 0.10), the first additive component consists of the metal oxide containing one or more kinds of Cr2O3 and Al2O3, and the second additive component consists of B2O3, SiO2 and MO (provided that MO consists of the metal oxide containing one or more kinds selected from BaO, GrO, CaO, MgO and ZnO). Also, the range of composition of the above-mentioned materials is within the region surrounded by the line linking the points A, B, C, D, E and F in the triangular diagram mentioned separately. As a result, a porcelain capacitor having high permittivity can be obtained. |
