Devitrification of TeO_2-doped Fluoroaluminate Glass  

作　　者：Bin TANG Xinqiang YUAN Tianfeng XUE Jiacheng LI Youyu FAN Hefang HU 

机构地区：[1]Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China [2]Graduate School of Chinese Academy of Sciences, Beijing 100039, China

出　　处：《Journal of Materials Science & Technology》2006年第4期565-568,共4页材料科学技术（英文版）

摘　　要：Crystallization behavior of the glass system AlF3-MgF2-CaF2-SrF2-BaF2-YFa-TeO2 （AMCSBY-TeO2） was studied by the nonisothermal method using differential thermal analysis. The activation energy E and Avrami exponent g were determined by nonisothermal method. It is found that the value of E varies with increasing TeO2 and reaches a minimum at 10 mol fraction TeO2, while g decreases from 3.65 to 1.78 with the addition of TeO2. X-ray diffraction shows that Ba2TeaOs, MgTe205, and SrTeOa phase formed when the glasses were reheated. The addition of TeO2 changes the crystallization mechanism and improves the stability of the fluoroaluminate glass.Crystallization behavior of the glass system AlF3-MgF2-CaF2-SrF2-BaF2-YFa-TeO2 （AMCSBY-TeO2） was studied by the nonisothermal method using differential thermal analysis. The activation energy E and Avrami exponent g were determined by nonisothermal method. It is found that the value of E varies with increasing TeO2 and reaches a minimum at 10 mol fraction TeO2, while g decreases from 3.65 to 1.78 with the addition of TeO2. X-ray diffraction shows that Ba2TeaOs, MgTe205, and SrTeOa phase formed when the glasses were reheated. The addition of TeO2 changes the crystallization mechanism and improves the stability of the fluoroaluminate glass.

关 键 词：Fluoroaluminate glass TeO2 CRYSTALLIZATION 

分 类 号：TQ171.716[化学工程—玻璃工业]