Production manner null of the dielectric porcelain constituent powder and lamination ceramic condenser and the dielectric porcelain constituent powder which use

摘要

PURPOSE: To provide dielectric ceramic composition powder capable of obtaining a large dielectric constant and a multilayered ceramic capacitor at a low cost having high reliability, a small size, and a large capacit-ance and made of this powder by using perovskite type oxide powder expressed by a specific formula. ;CONSTITUTION: At least one or more kinds of perovskite type oxide powders are used as main components, which include 0.03wt.% or less of alkaline metal oxide as impurity, are expressed by a formula ABO₃, and are produced by utilizing a hydrothermal reaction, thus obtaining dielectric ceramic composition powder which satisfies a formula {(Ba_1-xCa_x)O}_m(Ti_1-o-pZr_oNbp)O_2+p/2, wherein 0 ≤ (x) ≤0.20, 0 (o) ≤ 0.25, 0 ≤ (p) ≤ 0.015, and 1≤ (m) ⊖ 1.03. An A group element is selected from Ba and Ca, and a B group element is selected from Ti, Zr and Nb. As auxiliary components 0.02-2.0 mols of at least one or more kinds of oxides of Mn, Fe, Cr, Co and Ni are added to be included into 100 mols of the main components, where a specific surface is set to 8.0m²/g or less.;COPYRIGHT: (C)1994,JPO