| 摘要 |
<p>Zirconyl phosphate sintered bodies are disclosed, which each have a molar ratio of ZrO2/P2O5 being not less than 1.8 but less than 2.0 and contain beta -(ZrO)2P2O7 as a main crystalline phase. The zirconyl phosphate sintered bodies have a coefficient of thermal expansion and a thermal expansion hysteresis in a temperature range from room temperature to 1,400 DEG C being not more than 20x10<-><7>/ DEG C and 0.05 to 0.30%, respectively. A process for producing zirconyl phosphate sintered bodies is also disclosed, which comprises preparing a starting material powder of zirconyl phosphate, shaping the starting material powder, and firing the shaped bodies. The zirconyl phosphate starting material has a molar ratio of ZrO2/P2O5 being not less than 1.8 but less than 2.0 and the average particle diameter of 0.5 to 20 mu m, and contains oxides of an alkali metal and an alkaline earth metal in a total amount of not more than 0.5% by weight.</p> |
