Stability of Various Phases Produced on Surface of Sodium Bicarbonate

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  • KUNIYOSHI Minoru
    Process Development, Nanyo Technology Center, Tosoh Corp.
  • MURAKAMI Tsugio
    Process Development, Nanyo Technology Center, Tosoh Corp.
  • MIZOTA Tadato
    Department of Advanced Materials Science and Engineering, Faculty of Engineering, Yamaguchi University

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Other Title
  • 重炭酸ナトリウム表面の生成相の検討 - 重炭酸ナトリウム表面の安定性 -

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Abstract

Sodium bicarbonate is an unstable compound forming various related compounds on the surface. To understand the stability of sodium bicarbonate and the decomposition mechanism on the surface, the time-dependency of changes in compositions and kind of phases were examined at various temperatures and humidityies. Sodium sesquicarbonate was found to be formed on the sodium bicarbonate surface in the ambient climate conditions in Japan. Comparing phase relations of sodium carbonate quoted from literatures with those examined on the surface of sodium bicarbonate, phase stability of sodium carbonate was found to affect seriously the kind of phases on the surface of sodium bicarbonate.

Journal

  • Shigen-to-Sozai

    Shigen-to-Sozai 118 (12), 756-759, 2002

    The Mining and Materials Processing Institute of Japan

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