@article{oai:ir.kagoshima-u.ac.jp:00010722, author = {李, 信義 and LEE, Shinn-yih and 福重, 安雄 and FUKUSHIGE, Yasuo and 島田, 欣二 and SHIMADA, Kinji}, journal = {鹿児島大学工学部研究報告, The research reports of the Faculty of Engineering, Kagoshima University}, month = {Nov}, note = {The cristobalite porcelain as electric insulator were studied on the mixture ratio of raw materials, additional water and firing conditions of the green body. Moreover, thermal tests, mechanical tests, X-ray diffraction tests, and microstructure observations were conducted on the sintered body. The results are as follows : (1) The crystal of criststobalite in the sintered body grows up at the firing temperature of 1280° to 1300°C and mullite crystal at 1300° to 1320°C respectively. According to rising of temperature, quartz crystal is diminished on account of the transformation to cristobalite or the dissolving into matrix. (2) The compressive strength of the sintered body from the green body with 12 to 15% water content showed a maximam value of 25×10^<2> Kg/cm^<2>. And by adding of alumina or zircon the compressive strength of the sintered body increased remarkably and showed avarage value of 29×10^<2> Kg/cm^<2>. (3) Thermal expansion of sintered body was small and gave essentially straight line.}, pages = {61--69}, title = {クリストバライト磁器の合成について}, volume = {19}, year = {1977} }