| 摘要 |
PURPOSE:To increase a dielectric constant by using a composite metallic oxide composed of Ba, Mg, Zn, Ti, Ca, Zr shown in specific composition formula as a basic ingredient and adding two kinds of addition components consisting of metallic oxides having specific compositions respectively to the composite metallic oxide. CONSTITUTION:In a ceramic capacitor made up of a dielectric porcelain and two or more of electrodes brought into contact with the porcelain, the porcelain is composed of a 100.0 pts.wt. basic ingredient, a not more than 3.0 pts.wt. first addition component and a 0.2-5.0 pts.wt. second addition component, the basic ingredient is shown in formula I, one kind of a metallic oxide of Cr2O3 and Al2O3 is used as the first addition component, the second addition component consists of B2O3, SiO2 and MO (where MO represents one kind or more of metallic oxides of BaO, SrO, CaO, MgO and ZnO), and the composition range of B2O3, SiO2 and MO is set within a region surrounded by a straight line in which points A, B, C, D, E, F in a triangular diagram indicating these composition are tied successively. Accordingly, the dielectric porcelain for the capacitor can be acquired by baking at 1200 deg.C or lower in a non-oxidizing atmosphere. |
