微細気孔性シリカ多孔体の製造法

概要

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The production technique of porous compacts of ceramics containing fine pores have been developed. The mixtures of silica ultrafine particles (pre-treated with solvents) and liquid paraffin were pressed under 300 kg/cm^2 and then fired at 800°-920℃, and the characteristics of the compacts obtained were measured. Mixtures of ultrafine silica which was pre-treated by colloidal solution of silica and liquid paraffin of large quantities gave porous compacts containing fine pores. Better results were obtained when 1-18% colloidal silica was added in pre-treatment and the firing temperature was about 850℃. Apparent porosity was 60-80% for the obtained compacts. The mean pore diameter was 0.04 μm for the compacts fired at 800℃, which remained virtually with increasing firing temperature, but decreased with increasing content of colloidal silica. Specific surface area was 130 m^2/g for the compacts fired at 850℃, and decreased with an increase both in temperature and content of colloidal silica, respectively.
社団法人日本セラミックス協会の論文
1988-09-01