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The influence of Mg substitution for Al on the properties of SiMeRE oxynitride glasses

机译:Mg替代Al对SiMeRE氮氧化物玻璃性能的影响。

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The thermal mechanical properties of 60Si20Mg20RE (RE: rare earth) oxynitride glasses can be tailored by the substitution of rare earths of decreasing ionic size. The Young's modulus, hardness, glass transition temperature and viscosity all increase with the substitution La by Gd and Gd by Lu while the thermal expansion coefficients decrease. Compared to the 55Si25Al20RE oxynitride glasses, replacement of At by Mg lowers the glass transition temperatures and viscosities and raises the thermal expansion coefficients substantially. On the other hand, the Young's moduli are higher in the Mg-bearing glasses. These behaviors are seen to be a result in changes in the nature of the bonding in the glass structure. (C) 2003 Elsevier B.V. All rights reserved. [References: 31]
机译:60Si20Mg20RE(稀土:稀土)氧氮化物玻璃的热机械性能可以通过替代离子尺寸不断减小的稀土来定制。杨氏模量,硬度,玻璃化转变温度和粘度都随着用La取代Gd和用Lu取代Gd而增加,而热膨胀系数降低。与55Si25Al20RE氮氧化物玻璃相比,用Mg替代At会降低玻璃化转变温度和粘度,并显着提高热膨胀系数。另一方面,含镁玻璃中的杨氏模量较高。这些行为被认为是玻璃结构中键合性质变化的结果。 (C)2003 Elsevier B.V.保留所有权利。 [参考:31]

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