2000 年 7 巻 286 号 p. 172-177
Sinterability of CaO prepared from Al2O3 coated CaCO3-Ca (OH) 2 powder was investigated in order to clarify effect of Ca (OH) 2 and small amount of Al2O3 content.The CaCO3-Ca (OH) 2 mixed powders were coated with a chelate compound of aluminum corresponding to 0-0.1mass%Al2O3. The CIP'ed compacts of the powders were sintered at a rate of 300°C·h-1 up to 1500°C in air and held at 1500°C for 2h to prepare CaO ceramics. The bulk density and fine structure for the CaO ceramics were measured in process of sintering. The bulk density for the CaO ceramics prepared from CaCO3-Ca (OH) 2 mixed powder was higher than that from CaCO3 powder at the temperature above 800°C. The bulk density of the CaO ceramics was slightly increased with increase of Al2O3 content, while the CaO grain size was greatly increased with Al2O3 content.