| 摘要 |
A semi-conducting glaze composition is prepared by calcining a mixture of 85 - 94 mol percent, calculated as SnO2, of tin oxide and 6 - 15 mol percent, calculated as Sb2O5, of antimony oxide at a temperature of 1,000 DEG - 1,300 DEG C under an oxidizing atmosphere; mixing 25 - 45 percent by weight of the calcined material with 55 - 75 percent by weight of a conventional ceramic glaze composition; melting the resulting mixture at a temperature of 1,200 DEG - 1,400 DEG C under an oxidizing atmosphere and pulverizing the melt to prepare a fritted material; and mixing again not less than 70 percent by weight of the resulting fritted material with not more than 30 percent by weight of at least one member selected from the group consisting of clay, kaolin, bentonite and conventional ceramic glaze composition. By applying the above-mentioned semi-conducting glaze composition on a prepared insulator body, the surface electrical stress distributions of a heavy duty suspension and a solid core insulators, which require the firing under a reducing atmosphere, can be improved.
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