| abstract |
1451863 Capacitor composition TDK ELECTRONICS CO Ltd 9 Aug 1974 35198/74 Heading C1J [Also in Division H1] A barrier layer capacitor is formed from a ceramic composition comprising 0 to 98% by weight CaTiO 3 , 0 to 98% SrTiO 3 and 2 to 50% Bi 2 O 3 .xTiO 2 , where x is 0À5 to 9 and 0À025 to 0À4% by weight of Mn, Co, Ni, V, Cr, Nb, Ta, La or Ce. The composition, shaped into a disc or the like is sintered in an oxidizing atmosphere, fired in a reducing atmosphere to render it semi-conducting, silver electrodes are applied to opposite major surfaces and the body refined in an oxygen atmosphere to form an insulating barrier layer under the electrodes. |