Nanoscale phase separation effects near r¯=2.4 and 2.67, and rigidity transitions in chalcogenide glasses

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• 作者：Boolchand ; Punit ; Georgiev ; Daniel G. ; Qu ; Tao ; Wang ; Fei ; Cai ; Liuchun ; Chakravarty ; Swapnajit
• 关键词：nanoscale phase separation effects ; rigidity transitions ; chalcogenide glasses ; Raman ; Mö ; ssbauer ; effets de sé ; paration de phase à ; l’ ; é ; chelle nanomé ; trique ; transitions de rigidité ; verres chalcogé ; nures ; Ra
• 刊名：Comptes Rendus Chimie
• 出版年：2002
• 出版时间：November, 2002
• 年：2002
• 卷：5
• 期：11
• 页码：713-724
• 全文大小：644 K

文摘

Nanoscale phase separation effects are of general interest in glass science. Such structural effects produce usually pronounced changes in glass physical properties which can mask the more subtle elastic effects related to rigidity transitions. The glass-transition temperature, T_g, is an intrinsic measure of network connectivity. It can be expected to increase or decrease as a network polymerizes or nanoscale phase separates. Compositional trends in T_g(x) in binary As_xSe_1–x and Ge_ySe_1–y glasses show thresholds near the stoichiometric compositions, x