| 摘要 |
PURPOSE: A semiconductor ceramic is provided to have a resistivity at room temperature not greater than 3.5 OMEGA.cm, a withstand voltage not less than 50 V/mm, a resistance-temperature coefficient alpha 10- 100 not less than 9%/°C, and a reduced variability of resistance. CONSTITUTION: A semiconductor ceramic comprising barium titanate, lead titanate, strontium titanate, and calcium titanate as primary components, and samarium oxide as a semiconductor-forming agent,wherein the average diameter of crystalline particles of the semiconductor ceramic is 7 to 12 mu m.
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