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Energetics of oxidation of RE-Si-Al-O-N glasses

机译:RE-Si-Al-O-N玻璃的氧化能

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摘要

Enthalpies of drop solution in molten 52 wt.% LiBO_2-48 wt.% NaBO_2 at 1078 K were measured for RE_(1.1)Si_(1.7)Al_(0.6)O_(6-1.5x)N_x (x = 0, 0.2, 0.4, 0.6, 0.8) glasses for RE = Nd, Gd, Dy, Er, and Y. Linear relations between enthalpies of formation from elements and nitrogen content indicate that, within the experimental composition range, sites occupied by nitrogen ions are approximately equivalent in energy for a given substitutional series. The energetics of different rare-earth SiAlON glasses appears to be dominated by differences in the acid/base character of the cations. The onset glass-transition temperature increases linearly with increasing nitrogen content for the same rare earth and with decreasing rare-earth ionic radius for the same nitrogen content.
机译:测量RE_(1.1)Si_(1.7)Al_(0.6)O_(6-1.5x)N_x(x = 0,0.2, 0.4、0.6、0.8)的玻璃用于RE = Nd,Gd,Dy,Er和Y。元素形成焓与氮含量之间的线性关系表明,在实验组成范围内,氮离子占据的位点近似等于给定替代序列的能量。不同稀土SiAlON玻璃的能量似乎由阳离子的酸/碱特性差异决定。对于相同的稀土,起始玻璃化转变温度随氮含量的增加而线性增加,而对于相同的氮含量,起始玻璃化转变温度随稀土离子半径的减小而线性增加。

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