首页> 外文期刊>European Journal of Glass Science and Technology, PartB. Physics and Chemistry of Glasses >Influence of the cation nature on some dilatometric glass properties in the systems RO-Al_2O_3-B_2O_3 (R=Mg, Ca, Sr, Ba)
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Influence of the cation nature on some dilatometric glass properties in the systems RO-Al_2O_3-B_2O_3 (R=Mg, Ca, Sr, Ba)

机译:阳离子性质对系统RO-Al_2O_3-B_2O_3(R = Mg,Ca,Sr,Ba)中某些膨胀玻璃性能的影响

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摘要

Generalisations are made from numerous data obtained by investigating systematically such dilatometric glass properties as the glass transition temperature T_g, the thermal expansion coefficient TEC, and the structural thermal expansion coefficient STEC for the systems RO-B_2O_3 and RO-A1_2O_3-B_2O_3 (R=Mg, Ca, Sr, Ba) in wide concentration areas covering the glass formation regions of the systems under study. It has been shown that although concentration dependencies of the properties look complicated in these systems, for example, they have extrema and saddle points; they resemble one another in these systems with different alkaline earth cations. This similarity in the dependence of a considered property on composition indicates similar anion network changes taking place in the systems. In terms of the results of direct structural investigations it allows evaluation of some structural rearrangements occurring in them. Since glass anion networks are alike in these systems with different cations, the intensity of a given property is determined by the nature of a given cation.
机译:从系统研究RO-B_2O_3和RO-A1_2O_3-B_2O_3系统(R = Mg (Ca,Sr,Ba)的浓度范围覆盖研究系统的玻璃形成区域。已经表明,尽管在这些系统中特性的浓度依赖性看起来很复杂,但是它们具有极值和鞍点。它们在这些系统中彼此相似,具有不同的碱土金属阳离子。所考虑的性质对组成的依赖性上的这种相似性指示在系统中发生类似的阴离子网络变化。根据直接结构研究的结果,它可以评估其中发生的某些结构重排。由于在这些具有不同阳离子的系统中玻璃阴离子网络是相似的,因此给定特性的强度由给定阳离子的性质决定。

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