Pressure–volume–temperature (P–V–T) properties of Ge_xSe_1−x inorganic polymeric glasses

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• 作者：Brostow ; Witold ; Castañ ; o ; Victor M. ; Martinez-Barrera ; Gonzalo ; Saiter ; Jean-Marc
• 关键词：Chalcogen ; Glass ; GeSe ; Free volume ; Structure
• 刊名：Physica B
• 出版年：2003
• 期刊代码：53_09214526
• 类别：ph
• 出版时间：July, 2003
• 卷：334
• 期：3-4
• 页码：436-442
• 文件大小：128 K

摘要

We have studied the vitreous Ge_xSe_1−x chalcogenide alloys, varying x from 0.0 to 0.12. P–V–T results have been obtained for pressures up to 200Jcm⁻³ and temperatures up to 240°C or so. The P*, V* and T* parameters of the Hartmann equation of state (EOS) were evaluated. With increasing Ge concentration the specific volume increases, passes through a maximum and then decreases. By contrast, the characteristic (hard-core) volume V* passes through a minimum and so does the characteristic temperature T*. On the basis of these results in conjunction with earlier ones we provide an expanded model of atomic packing and phase structures of the alloys.