鉄を含む赤土粘土の色と焼結特性に炉内雰囲気が与える影響

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タイトル別名
  • Influence of Kiln Atmosphere on Color and Sintering Properties of Red Clay Containing Iron
  • テツ オ フクム アカツチ ネンド ノ イロ ト ショウケツ トクセイ ニ ロ

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抄録

Phase transformations of clay containing iron oxide, by firing under various atmospheric conditions up to 1250°C, were studied by X-ray diffraction and ESR. Under reducing conditions and at low temperature (1100°C), hercynite was formed but dissociated at high temperature. Iron oxide was reduced to metallic iron under strongly reducing conditions. The stable phase of hematite appeared when fired in oxidizing atmospheres at 1250°C. Three types of color were observed in the fired products, such as, red in oxidative firing, black in neutral or strongly reductive firing, and yellowish brown in mild reductive firing. Mechanical property was found to be weakest when fired at air ratio of 0.9, that was, under mild reducing condition. This paper describes the effect of atmospheric conditions on firing properties of Japanese clay containing iron oxide for industrial applications.

収録刊行物

  • 窯業協會誌

    窯業協會誌 93 (1079), 349-356, 1985

    公益社団法人 日本セラミックス協会

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