Meeting experimental challenges to physics of network glasses: Assessing the role of sample homogeneity

Bhosle S.; Gunasekera K.; Chen P.Boolchand P.Micoulaut M.Massobrio C.

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Meeting experimental challenges to physics of network glasses: Assessing the role of sample homogeneity

机译：Meeting experimental challenges to physics of network glasses: Assessing the role of sample homogeneity

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We introduce a Raman profiling method to track homogenization of Ge _xSe_(100-x) melts in real time, and show that 2 g melts reacted at 950 °C in high vacuum homogenize in 168 h on a scale of 10μm. Homogenization of melts is precursive to self-organization of glasses. In the present glasses, compositional variation of Raman active corner-sharing mode frequency of GeSe_4 units, molar volumes, and the enthalpy of relaxation at ~(Tg), reveal the rigidity (~(xc)(1)=19.5(3)) and the stress (~(xc)(2)=26.0(3)) transitions to be rather sharp (Δx<0.6). These abrupt elastic phase transitions are in harmony with rigidity theory and have a direct bearing on the physics of glasses

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《Solid State Communications》 |2011年第24期|1851-1855|共5页
作者
Bhosle S.; Gunasekera K.; Chen P.Boolchand P.Micoulaut M.Massobrio C.;
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作者单位

Laboratoire de Physique Theorique de la Matiere Condensee, Universite Pierre et Marie Curie, Boite 121, 4 Place Jussieu, 75252 Paris Cedex 05, France;

Institut de Physique et de Chimie des Materiaux de Strasbourg, 23 rue du Loess, F-67034 Strasbourg Cedex 2, France;

School of Electronic and Computing Systems, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, OH 45221-0030, United States;

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原文格式 PDF
正文语种英语
中图分类固体物理学;
关键词
A. Chalcogenide glasses; D. Self-organization; E. Modulated DSC; E. Raman scattering;

Meeting experimental challenges to physics of network glasses: Assessing the role of sample homogeneity

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