窒化珪素の焼結に及ぼす各種添加剤の効果

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タイトル別名
  • Effects of the Additives on Sintering of Si<SUB> 3</SUB>N<SUB> 4</SUB>
  • チッカ ケイソ ノ ショウケツ ニ オヨボス カクシュ テンカザイ ノ コウカ

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説明

Effects of the additives on sintering of Si 3N4 have been studied. As the additives, Al(OH) 3, Al powder, A1PO4, AIN, SiC, Si powder, SiO2, MgO, TiO2, BN, Fe2O3, etc. were used. The powder of Si 3N 4 was mixed with 1, 3 or 5 wt. % of the additive, and then was pressed isostatically at 1000 kg/cm2. Sintering was done in the N 2 atmosphere at 1530°C for 4 hours. The most effective additive was MgO at 5 wt. %, followed by MgO at 3 wt. %, and the third was Al(OH) 3 at 5 wt. %. Moduli of rupture of these bodies were 830 kg/cm2, 664 kg/cm2, and 414 kg/cm2 respectively.

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