湿式合成されたPLZT粉末成形体中からの超臨界二酸化炭素によるステアリルアルコールの脱脂 : 合成・キャラクタリーゼーション

概要

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Different agglomerated powders of PLZT were prepared from aqueous nitrate solutions using two preparation methods. The microstructure developed during calcination at 450°-470℃ was determined by powder characteristics such as crystalline phase, particle morphology and size, agglomeration, and surface area. Green compacts containing 5 wt% stearyl alcohol binder were fabricated by uniaxial pressing. Extraction of the binder was carried out with supercritical carbon dioxide at 35°-65℃ under the pressure of 9.81 MPa or 19.6 MPa. The degree of agglomeration of calcined powders influenced the extraction. The extraction process is discussed on the basis of mass- transfer resistance in compacts and chemical affinity between powder surface and stearyl alcohol.
社団法人日本セラミックス協会の論文
1990-08-01