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Preparation of β-CaSiO<sub>3</sub> powder by water vapor-assisted solid-state reaction

  • KOZAWA Takahiro
    Faculty of Pure and Applied Sciences, University of Tsukuba Research Laboratory of hydrothermal Chemistry, Faculty of Science, Kochi University
  • YANAGISAWA Kazumichi
    Research Laboratory of hydrothermal Chemistry, Faculty of Science, Kochi University
  • YOSHIDA Anri
    Research Laboratory of hydrothermal Chemistry, Faculty of Science, Kochi University
  • ONDA Ayumu
    Research Laboratory of hydrothermal Chemistry, Faculty of Science, Kochi University
  • SUZUKI Yoshikazu
    Faculty of Pure and Applied Sciences, University of Tsukuba

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  • Preparation of β-CaSiO₃ powder by water vapor-assisted solid-state reaction

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Abstract

Solid-state reaction between carbonate and/or oxide precursors is a simple method to prepare ceramic powders. However, a high calcination temperature is required for this method because of limited diffusion during calcination. In this paper, we describe that the formation of β-CaSiO3 by solid-state reaction is accelerated by water vapor. β-CaSiO3 powders have been prepared by solid-state reaction between CaCO3 and amorphous SiO2 as a raw material. Single-phase β-CaSiO3 was successfully prepared by one-step calcination at 800°C for 2 h in water vapor, while it seemed to be difficult to prepare the single-phase β-CaSiO3 by calcination in air. Water vapor-assisted solid-state reaction is likely to be applicable to prepare other functional ceramic powders at low temperatures.

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