| 摘要 |
PURPOSE:To enhance the permittivity of the title poroelain capacitor by a method wherein a metal oxide of Ba and Mg or Zn and Ti, in which a porcelain is indicated in a specific chemical formula, is used as the fundamental component, Cr2O3 or Al2O3 is used as a first additive, and the material within the specific range of composition, selected from three ingredients of Li2O, SiO2 and a specific metal oxide, is used as the second additive. 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 is (Bak-xMx)OkTiO2 (provided that M consists of one or more kinds of metal selected from Mg and Zn, (k) indicates the value within the range of 0.01 to 0.10), the first additive component is a metal oxide consisting of one or more kinds selected from Cr2O3 and Al2O3, and the second additive component consists of Li2O, SiO2 and Mo (provided that Mo indicates metal oxide consisting of one or more kinds selected from BaO, SrO, CaO, MgO and ZnO), and the range of composition of the above- mentioned material is to be within the region surrounded by the line linking the points A, B, C, U and E successively in the triangle diagram mentioned separately. As a result, the title porcelain capacitor having a high permittivity can be obtained. |
