Effect of CaCO3-Y2O3 Addition on Synthesis of AIN Powder by Carbothermal Reduction-Nitridation of Al2O3.

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  • IDE Takayuki
    Graduate School of Environment and Information Sciences, Yokohama National University
  • KOMEYA Katsutoshi
    Graduate School of Environment and Information Sciences, Yokohama National University
  • SUEHIRO Takayuki
    Graduate School of Environment and Information Sciences, Yokohama National University
  • TATAMI Junichi
    Graduate School of Environment and Information Sciences, Yokohama National University
  • MEGURO Takeshi
    Graduate School of Environment and Information Sciences, Yokohama National University
  • NAITO Makio
    Japan Fine Ceramics Center
  • HOTTA Tadashi
    Japan Fine Ceramics Center
  • KUIBIRA Akira
    Sumitomo Electric Industries, Ltd.

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Other Title
  • 還元窒化法によるＡＩＮの合成に及ぼすＣａＣＯ３‐Ｙ２Ｏ３添加の影響
  • カンゲン チッカホウ ニ ヨル AlN ノ ゴウセイ ニ オヨボス CaCO3-Y2O3 テンカ ノ エイキョウ

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The effect of addition of binary system CaO-Y2O3 on the synthesis of AlN powder by carbothermal reductionnitridation of Al2O3 was investigated. The nitridation was conducted at 1450°C in N2 gas flow. The morphology of synthesized powders was different from the original Al2O3 powder. The XRD analysis showed that the reaction progressed through formation of several aluminates during nitridation. These aluminates were confirmed to promote the nitridation and vary the morphology of raw Al2O3. The amount of additives remained in final product is smaller than that of starting powder. This synthesized powder is considered to be advantageous to the densification because remaining compounds can act as a sintering aid.

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