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

Takahiro KOZAWA; Kazumichi YANAGISAWA; Anri YOSHIDA; Ayumu ONDA; Yoshikazu SUZUKI

doi:10.2109/jcersj2.121.103

Feature: Ceramics Processing through Energy Consumption Reduction (Green Processing): Notes

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

Takahiro KOZAWA, Kazumichi YANAGISAWA, Anri YOSHIDA, Ayumu ONDA, Yoshikazu SUZUKI

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Keywords: CaSiO₃, Wollastonite, Calcium silicate, Solid-state reaction, Water vapor, Water vapor-assisted formation

JOURNAL FREE ACCESS

2013 Volume 121 Issue 1409 Pages 103-105

DOI https://doi.org/10.2109/jcersj2.121.103

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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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