Fabrication of apatite/zirconia layer composite filter

摘要

The solid state reaction and sintering in the composite,which was formed by powder mixture,dry-pressing compaction and tape cast process,were examined for the purpose of producing a layered hydroxyapatite/zirconia ceramic filter.The solid state reaction between hydroxyapatite and zirconia occurred in a limited region at interface in a layered composite body.After sintering of the layer composites from powder pressing and slip casting,the significant deformation of composite bodies was observed,depending on sintering temperatures.By selecting a sintering temperature,we formed a layer ceramic composite of hydroxyapatite/zirconia exhibiting flat film shape.The tape cast process was useful for making a porous sintered composite of hydroxyapatite and zirconia.The porous composite showed the removal property of aqueous lead from wastewater without deformation and dissolution in a ceramic.