AlN焼結体の酸素と水蒸気による酸化

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タイトル別名
  • Oxidation of Sintered Aluminum Nitride by Oxygen and Water Vapor
  • AlN ショウケツタイ ノ サンソ ト スイジョウキ ニ ヨル サンカ

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Oxidation behavior of sintered AlN by oxygen and water vapor was studied at 1400°C for the purpose of surface treatment. The partial pressure of oxygen, Po<sub>2</sub> was controlled at 10-10 and 10kPa, and that of water vapor, PH<sub>2O</sub> was changed at 5.0×10-2 to 8.5kPa. The oxidation product detected by XRD was α-Al2O3. Oxidation rate was increased with increasing PH<sub>2O</sub>. The weight gain with time by oxygen was parabolic, and that by water vapor was linear. The Al2O3 layer formed by the oxidation of sintered AlN with oxygen was relatively dense, and coherent. The oxidation kinetics were discussed using the mixed-control rate equation on the basis of unreacted-core model.

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