液中プラズマ法による12CaO • 7Al2O3 粉末の低温合成

概要

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12CaO • 7Al2O3 (C12A7) crystal has 12 cages in the unit cell, and two free oxygen ions are encaged in the cages. These ions can be replaced with various anions by the appropriate processing to show various characteristics. Solution plasma processing is a method of synthesizing the material by vaporization of the liquid with a electric discharge, to be a plasma, as a reaction field. This method has advantage of rapid reaction at lower temperatures over conventional powder preparation methods because of the high density reaction field localized at the interface between liquid and gaseous phases. However, this method has been started to study in the recent years, therefore,there are many issues to be solved to apply it as a powder preparation method. In this study, C12A7 particles were synthesized from alkoxide-derived precursor solution by solution plasma processing for the low-temperature synthesis. The obtained C12A7 precipitates were characterized by XRD, TEM, and so on. As a result, C12A7 particles were successfully synthesized at low temperature of 200 ˚C or less by solution plasma processing, showing that this method will be a powerful tool to obtain nanopowders at low temperatures.
一般社団法人粉体粉末冶金協会の論文