Ge10As40Se50硫系玻璃黏温性能及动力学强弱性  

Temperature Dependence of Viscosity and Fragility of Ge10As40Se50 Chalcogenide Glass

作　　者：周鹏 赵华 祖成奎 郭腾霄 徐建洁 刘永华 陶海征[3] 石凯文 张瑞 陈玮 ZHOU Peng;ZHAO Hua;ZU Chengkui;GUO Tengxiao;XU Jianjie;LIU Yonghua;TAO Haizheng;SHI Kaiwen;ZHANG Rui;CHEN Wei(Institute of Glass Science,China Building Material Academy,Beijing 100024,China;National Key Laboratory of Nuclear and Biochemical Disaster Prevention,Beijing 102205,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]中国建筑材料科学研究总院有限公司玻璃科学研究院,北京100024 [2]国民核生化灾害防护国家重点实验室,北京102205 [3]硅酸盐建筑材料国家重点实验室,武汉理工大学,武汉430070

出　　处：《硅酸盐学报》2020年第5期718-722,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然基金(60808024)。

摘　　要：采用纤维伸长法、旋转法测试了Ge10As40Se50硫系玻璃的黏度。通过比较不同方程的准确性,确定Vogel-Fulcher-Tammann方程为该玻璃黏度拟合的最优模型,推导出玻璃黏度随温度的变化关系,根据Angell图计算其强弱性指数m,与其他GexAsySe1-x-y玻璃的m进行比较,采用X射线光电子能谱仪对其网络结构进行分析。结果表明:在平均配位数r为2.0~2.6区间内,GexAsySe1-x-y系统玻璃的动力学强弱性整体的变化趋势符合拓扑约束理论,表现为随着r变大,GexAsySe1-x-y系统的m整体上呈现降低的趋势,但是当r大于2.2,m值并不严格随着r的变大而减小,r为2.6的Ge10As40Se50硫系玻璃存在的Se链结构影响了网络结构稳定性,导致其强弱性指数m偏高。The viscosity of Ge10As40Se50 chalcogenide glass was investigated by fiber elongation and rotation methods.The Vogel-Fulcher-Tammann equation was proposed as an optimal fitting model after comparing to the accuracy of different equations.GexAsySe1-x-y glasses were compared according to the fragility,m,derived from the Angell plot.The network structure of Ge10As40Se50 chalcogenide glass was investigated by X-ray photoelectron spectroscopy(XPS).The results show that the fragility change of GexAsySe1-x-y glasses follows the topological constraint theory in the range of the average coordination numbers(i.e.,r=2.0-2.6).The m of GexAsySe1-x-y glasses decreases as r increases.However,the m does not strictly decrease as r increases when r is greater than 2.2.Based on the XPS results,Ge10As40Se50 chalcogenide glass exists Se chain in the network structure,thus affecting the stability and results at a greater m.

关 键 词：硫系玻璃 黏温特性 强弱特性 网络结构 

分 类 号：TQ171[化学工程—玻璃工业]