BARIUM TITANATE BASED SEMICONDUCTOR PORCELAIN COMPOSITION

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A semiconductor porcelain composition containing barium titanate as a main component which further comprises, relative to 100 moles of barium titanate, 0.05 to 0.20 moles of calcium titanate, 20 to 30 moles of strontium titanate, 0.05 to 0.15 moles of a manganese oxide and 2.5 to 3.5 moles of a silicon oxide, and still further comprises 0.25 to 0.30 moles of an oxide of a rare earth element as an agent for converting the composition to a semiconductor.