Patent ID: 6221800
Filing Date: 2001-04-24
Classification: C04B,H01C

Abstract:
A method of producing a PTC semiconducting ceramic, which comprises:(a) preparing a calcine of a main composition of a barium titanate-based semiconductor containing substantially no Si and having BaTiO.sub.3 as a main component thereof and a semi-conductor forming element or oxide thereof;(b) preparing additive compositions, Ba.sub.2 TiSi.sub.2 O.sub.8 and Ba.sub.n Ti.sub.m O.sub.n+2m (1.ltoreq.n.ltoreq.4, 2.ltoreq.m.ltoreq.13, n.ltoreq.m), respectively; and(c) compounding said calcine of the main composition and said additive compositions and mixing them, and then subjecting them to formal firing.