Homopolar bonds in Se-rich Ge-As-Se chalcogenide glasses  

作　　者：许思维 王荣平 杨志勇 王丽 Luther-Davies Barry 

机构地区：[1]College of Applied Sciences, Beijing University of Technology [2]Laser Physics Centre, Research School of Physical Science and Engineering, Australian National University [3]College of Physics and Electronic Engineering, Jiangsu Normal University

出　　处：《Chinese Physics B》2016年第5期288-292,共5页中国物理B（英文版）

基　　金：Project supported by the Australian Research Council(ARC)Centre of Excellence for Ultrahigh Bandwidth Device for Optical System(Project CE110001018);Australian Research Council Discovery Programs(Project DP110102753);the Importation and Development of High-Caliber Talents Project of Beijing Municipal Institutions,China

摘　　要：We have prepared three groups of Ge–As–Se glasses in which the Se content is 5.5 mol%, 10 mol%, and 20 mol%rich, respectively. We explored the possibility of suppressing the formation of the Ge–Ge and As–As homopolar bonds in the glasses. Thermal kinetics analysis indicated that the 5.5 mol% Se-rich Ge_（11.5）As_（24）Se_（64.5） glass exhibits the minimum fragility and thus is most stable against structural relaxation. Analysis of the Raman spectra of the glasses indicated that the Ge–Ge and As–As homopolar bonds could be almost completely suppressed in 20 mol% Se-rich Ge_（15）As_（14）Se_（71） glass.We have prepared three groups of Ge–As–Se glasses in which the Se content is 5.5 mol%, 10 mol%, and 20 mol%rich, respectively. We explored the possibility of suppressing the formation of the Ge–Ge and As–As homopolar bonds in the glasses. Thermal kinetics analysis indicated that the 5.5 mol% Se-rich Ge_（11.5）As_（24）Se_（64.5） glass exhibits the minimum fragility and thus is most stable against structural relaxation. Analysis of the Raman spectra of the glasses indicated that the Ge–Ge and As–As homopolar bonds could be almost completely suppressed in 20 mol% Se-rich Ge_（15）As_（14）Se_（71） glass.

关 键 词：chalcogenide glasses STRUCTURE differential scanning calorimetry Raman scattering 

分 类 号：TQ171.1[化学工程—玻璃工业]