| 摘要 |
PURPOSE:To increase specific resistance by containing barium oxide, strontium oxide, silicon oxide, and zirconium oxide as main components, and substituting part of ZrO2 with one or more of TiO2 and SnO2. CONSTITUTION:Among compositions ranging surrounded by Points A-D (X, Y, Z) containing barium oxide, strontium oxide, silicon oxide, and zirconium oxide as main component, wherein the total of barium oxide content and strontium oxide content is X parts by weight converted into (Ba1-aSra)O(0<a<=0.9), the silicon oxide content Y parts by weight converted in SiO2, and the zirconium oxide content Z parts by weight converted in ZrO2 (where X+Y+Z=100), part of ZrO2 is substituted with one or more of TiO2 and SnO2 by an amount of 1-30 parts by weight. Here it is assumed as A(50, 49, 1), B(50, 20, 30), C(15, 20, 65), D(15, 84, 1). This can raise the specific resistance of porcelain over 10<12>OMEGAcm even though sintering is made at a low temp. and baking in non- oxidizing atmosphere. |
