気体透過特性からの異なる構造を持つ円筒型多孔性セラミックフィルターの細孔径分布の評価

概要

論文の詳細を見る
Different structural porous ceramic filters were investigated by the nitrogen gas permeability through the filters which were immersed in ethanol bath. The proposed method can discriminate between symmetric and asymmetric pore structure from the nitrogen gas permeability, and further the pore size distributions can be calculated from the relationship between volumetric flow rate and pressure. The permeability of the symmetric filter can be described on the basis of the Hagen Poiseuine equation and the calculated result of pore size distribution was in accordance with the data from the measurement using mercury penetration porosimetry. Also the pore size distribution ranges in the limit of pore size corresponding to the pressure in which the total permeable area increases remarkably. In the case of the asymmetric filter, a discontinuous point was shown in the relationship between exhaust pressure and volumetric velocity. It was shown that this discontinuity was due to the asymmetric pore structures. The asymmetric permeability was also described on the basis of the Hagen Poiseuine equation. It was found from the conrparison of the results between the gas and mercury penetration methods that the gas penetration method could be applied to the measurement of the pore size distribution of the skin part in the filter which indicated asymmetry.
社団法人日本セラミックス協会の論文
1994-05-01