The effects of fluorine and nitrogen substitution for oxygen in aluminosilicate glasses, effectively oxyfluoronitride (OFN) glasses, modified by calcium, calcium – yttrium or calcium – magnesium on thermal and physical / mechanical properties have been compared. Thus, forty-two glasses in the Ca–(Mg)–(Y)–Si–Al–O–(N)–(F) system have been prepared and characterized with respect to density (ρ), molar volume (MV), compactness (C), free volume (FV), glass transition temperatures measured by DTA (Tg,DTA) and dilatometry (Tg,dil), dilatometric softening point (TDS), microhardness (μHv) and Young's modulus (E). Gradients of property variation with nitrogen or fluorine substitutions for oxygen are similar for all three different oxyfluoronitride glass systems and are comparable with those reported for other OFN glasses, again indicating independent and additive effects of nitrogen and fluorine. In attempting to further understand how fluorine affects the cross-link density (CLD) in OFN glasses, it becomes apparent that it is necessary to allow for a greater contribution by aluminium in a modifier role as fluorine content is increased. This modified calculation of CLD values results in good linear fits between Tg and CLD values. This analysis clearly demonstrates and endorses the concepts that thermal properties are related to CLD whilst physical / mechanical properties are dependent on glass compactness. This article is protected by copyright. All rights reserved.

中文翻译：

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成分对 Ca-(Mg)-(Y)-Si-Al-氧氟氮化物玻璃交联密度的影响

已经比较了氟和氮在铝硅酸盐玻璃中替代氧的效果，即有效的氧氟氮化物 (OFN) 玻璃，由钙、钙 - 钇或钙 - 镁改性，对热和物理/机械性能的影响进行了比较。因此，已经制备了 Ca–(Mg)–(Y)–Si–Al–O–(N)–(F) 系统中的 42 种玻璃，并对其进行了密度 (ρ)、摩尔体积 (MV) 表征、致密性 (C)、自由体积 (FV)、通过 DTA (Tg,DTA) 和膨胀法 (Tg,dil) 测量的玻璃化转变温度、膨胀软化点 (TDS)、显微硬度 (μHv) 和杨氏模量 (E)。对于所有三种不同的氧氟氮化物玻璃系统，随着氮或氟取代氧的性质变化梯度相似，并且与其他 OFN 玻璃报道的那些梯度相当，再次表明氮和氟的独立和累加效应。在试图进一步了解氟如何影响 OFN 玻璃中的交联密度 (CLD) 时，很明显，随着氟含量的增加，有必要允许铝在改性剂中发挥更大的作用。CLD 值的这种修改计算导致 Tg 和 CLD 值之间的良好线性拟合。该分析清楚地证明并认可了热性能与 CLD 相关而物理/机械性能取决于玻璃致密性的概念。本文受版权保护。版权所有。很明显，随着氟含量的增加，有必要让铝在改性剂中发挥更大的作用。CLD 值的这种修改计算导致 Tg 和 CLD 值之间的良好线性拟合。该分析清楚地证明并认可了热性能与 CLD 相关而物理/机械性能取决于玻璃致密性的概念。本文受版权保护。版权所有。很明显，随着氟含量的增加，有必要让铝在改性剂中发挥更大的作用。CLD 值的这种修改计算导致 Tg 和 CLD 值之间的良好线性拟合。该分析清楚地证明并认可了热性能与 CLD 相关而物理/机械性能取决于玻璃致密性的概念。本文受版权保护。版权所有。本文受版权保护。版权所有。本文受版权保护。版权所有。