Ln-Si-Al-O-N系オキシナイトライドガラスの性質(Ln=希土類)

概要

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Effect of radius of rare earth ions on the characteristics of oxynitride glasses in the Ln-Si-Al-O-N systems (Ln=Dy, Er, Gd, La, Nd, Sm, Y, Yb) was studied. The glass transition temperature and the softening temperature of these glasses were determined, but their correlation with the radius of rare earth ions was found to be weak. Oxidation behavior of these glasses was analyzed by assuming that the weight change is proportional to the n th power of the oxidation time, and it was found that the oxidation exponent, n, tends to decrease and that the oxidation resistance tends to increase with decreasing radius of rare earth ions. Yb-Si-Al-O-N glass had the best oxidation resistance in these rare earth containing oxynitride glasses. The oxidation mechanism of the oxynitride glasses was also discussed.
1994-03-01