Low-temperature Synthesis of 12CaO • 7Al<sub>2</sub>O<sub>3</sub> Particles by Solution Plasma Processing

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  • MANEYAMA Shiori
    Department of Electronics and Materials Science, Shizuoka University,
  • SAKAMOTO Naonori
    Department of Electronics and Materials Science, Shizuoka University, Research Institute of Electronics, Shizuoka University,
  • WAKIYA Naoki
    Department of Electronics and Materials Science, Shizuoka University, Research Institute of Electronics, Shizuoka University,
  • OHNO Tomoya
    Department of Materials Science, Kitami Institute of Technology
  • MATSUDA Takeshi
    Department of Materials Science, Kitami Institute of Technology
  • SUZUKI Hisao
    Research Institute of Electronics, Shizuoka University,

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Other Title
  • 液中プラズマ法による12CaO • 7Al<sub>2</sub>O<sub>3 </sub>粉末の低温合成
  • 液中プラズマ法による12CaO・7Al₂O₃粉末の低温合成
  • エキ チュウ プラズマホウ ニ ヨル 12CaO ・ 7Al ₂ O ₃ フンマツ ノ テイオン ゴウセイ
  • Low-temperature Synthesis of 12CaO • 7Al2O3 Particles by Solution Plasma Processing

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Abstract

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.

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