| 摘要 |
PURPOSE:To provide the title composition having high dielectric strength and small resistivity by simultaneously replacing a part of Ba with Ca, Sr and Pb and specifying MnO2, silica and semiconducting agent to be added. CONSTITUTION:The objective composition consisting essentially of 30-95mol% BaTiO3, 3-25mol% CaTi, 1-25mol% SrTiO3 and 1-30mol% PbTiO3 and containing >=0.05 and <0.2mol% one or more kinds of rare earth elements such as Y, La and Ce or oxide of Nb, Bi, Sb, W and Th as semiconducting agent and containing >=0.003 and <0.03mol% Mn (expressed in terms of MnO2) and >=0.01 and <0.5mol% silica. (expressed in terms of SiO2). The composition has excellent characteristics of >=100V/mm dielectric strength and <=10OMEGA.cm resistivity. |
