| 摘要 |
To provide a semiconductor ceramic composition containing no Pb in which a part of Ba in BaTiO3 is substituted with Bi-Na, which is capable of shifting the Curie temperate to a positive direction as well as of greatly lowering resistivity at room temperature, and a method for producing the same. BaTiO3 calcined powder and (BiNa)TiO3 calcined powder, which contain no semiconductive dopant, are prepared separately, the calcined powders are mixed, crushed, formed, and then sintered in an inert gas atmosphere having an oxygen concentration of 1% or less to obtain a semiconductor ceramic composition represented by a composition formula: [(BiNa)xBa1-x]TiO3 in which x satisfies 0<x<=0.3.
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