石炭灰を利用した多孔質セラミックスの合成とその特性

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Porous sintered materials for water-purifier were synthesized with fly-ash and bentonite at 900℃, and their chemical and physical properties were established by XRD, SEM, compressive strength test and mercury porosimetry.The compressive strength of the sintered bodies made from binary systems of fly-ash and bentonite was about 10 MPa.X-ray diffraction analysis showed that albite ((Na, Ca)Al(Si, Al)_3O_8) and anorthite ((Na, Ca)(Si, Al)_4O_8) were newly crystallized.From the porosity analysis of sintered materials, a decrease of porosity was observed with increasing the bentonite content in raw materials.To confirm the silicate anion structures, trimethylsililation of the sintered materials were carried out.The progress of polymerization of a part of silicate anion formed straight-chain was observed, therefore it seemed that the strength of the sintered materials was influenced by the polymeriazation of silicate anion.Pore with diameter of about 10μm were produced by adding small amount of amino powder to the raw materials as the third component.In this study, it was shown that the porous sintered materials demonstrated the good immobilization properties of bacteria in their many pores.Therefore these materials have a good performance of water-purifier with many pores and an adequate strength.
社団法人日本セラミックス協会の論文
1998-09-01