PROCESS FOR PRODUCING SEMICONDUCTIVE PORCELAIN COMPOSITION AND HEATER EMPLOYING SEMICONDUCTIVE PORCELAIN COMPOSITION

摘要

preparing a (BaQ)TiO3 calcined powder (Q is a semiconductor-forming element); preparing a (BiNa)TiO3 calcined powder; mixing the (BaQ)TiO3 calcined powder with the (BiNa)TiO3 calcined powder; compacting the calcined-powder mixture and sintering the compact; and heat-treating the resultant sintered compact at 600°C or lower. Also provided is a PTC heater employing an element produced by the steps.