| abstract |
A semiconductor ceramic composed of barium titanate, lead titanate, strontium titanate, and calcium titanate as primary components, includes samarium oxide as a semiconductor-forming agent in the primary components, and the average diameter of crystalline particles of the semiconductor ceramic is 7 to 12 mum. The semiconductor ceramic has a resistivity at room temperature not greater than 3.5 Omega x cm, a withstand voltage not less than 50 V/mm, and a resistance-temperature coefficient alpha 10-100 not less than 9%/DEG C, and also has a less variability of resistance. |