微細気孔性アルミナ多孔体の製造法

概要

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The purpose of the present investigation was to establish the production technique of porous compacts of ceramics containing fine pores. Alumina powders of various particle sizes blended with solvent were pressed under 300 kg/cm^2 and then fired at 1OOO°-1375℃, and the characteristics of the obtained compacts were measured. Combination of ultrafine alumina having primary particle diameter of 20 nm with liquid paraffin ( viscosity at 40℃ was 14 cSt, quantity was 3.5 times of the true volume of alumina) gave highly porous compacts containing fine pores. However the ultrafine alumina powder had to be pretreated by water to prevent cracking in firing. Porosity and specific surface area were 78% and 53 m^2/g, respectively, for the compact fired at 1000℃, and 66 % and 6 m^2/g for that at 1350℃. Pore diameter in the compacts fired at 1000° and 1350℃ were less than 12 μm and distributed having peaks at 0.03 and 0.26 μm, respectively.
社団法人日本セラミックス協会の論文
1988-08-01