La2O3对SiO2-CaO-Al2O3-MgO熔体黏度和结构的影响  

Effects of La2O3 on Viscosity and Structure of SiO2-CaO-Al2O3-MgO Melt

作　　者：王智 郭文涛 赵增武 王文峰[4] WANG Zhi;GUO Wentao;ZHAO Zengwu;WANG Wenfeng(Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources,Inner Mongolia University of Science and Technology,Baotou 014010,China;School of Industrial Technology Research Institute,Inner Mongolia University of Science and Technology,Baotou 014010,China;Inner Mongolia Autonomous Regional Engineering Technology Research Center of Sustainable Exploitation of Rare Earth Secondary Resources,Inner Mongolia University of Science and Technology,Baotou 014010,China;School of Energy and Environment,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室,内蒙古包头014010 [2]内蒙古科技大学工业技术研究院,内蒙古包头014010 [3]内蒙古科技大学内蒙古自治区稀土二次资源可持续利用工程技术研究中心,内蒙古包头014010 [4]内蒙古科技大学能源与环境学院,内蒙古包头014010

出　　处：《有色金属工程》2020年第8期20-26,共7页Nonferrous Metals Engineering

基　　金：国家自然科学基金资助项目(51774189);内蒙古自治区重大基础研究开放课题(0406091701,20140201);内蒙古自治区自然科学基金(2020BS05016,2018ZD07,2019BS05018);包头市科技计划项目(2017Z1009-2);内蒙古自治区高等学校科学技术重点项目(NJZZ19124);内蒙古科技大学创新基金(2016QDL-B26)。

摘　　要：使用分析纯物质模拟微晶玻璃熔体,分别采用柱体旋转法和拉曼光谱技术研究了La2O3含量对SiO2-CaO-Al2O3-MgO熔体黏度和结构的影响规律。结果表明:熔体黏度和黏流活化能随着La2O3含量的增加而降低;拉曼光谱表明La2O3能破坏硅酸盐结构(Qn),随着La2O3含量的增加,Q1、Q2的百分含量增加,Q3的百分含量减小,Q0的百分含量基本不变,表明熔体中非桥氧数量增加,熔体聚合度降低。La2O3在熔体中起网络修饰体的作用。For the melting process of glass-ceramics,the melts are simulated by using analytically pure materials in high temperature.The effects of La2O3 on the viscosity and structure for the CaO-SiO2-MgO-Al2O3 melt are studied via both rotating-cylinder method and Raman spectroscopy.The results show that the viscosity and viscous flow activation energy decreases as the La2O3 content increases.The addition of La2O3 destroyed the silicate structural units(Q n)in the melt.The percent of Q1,Q2 units increases with increasing amount of La2O3.However,the percent of Q3 units decreases with increasing amount of La2O3.In addition,the percent of Q0 units are slightly dependent on the La2O3 content.It indicates that the addition of La2O3 increase the number of non-bridging oxygen in the silicate structural units and reduce the degree of polymerization.La2O3 play a role as network modifier in the melt.

关 键 词：LA2O3 黏度 熔体结构 拉曼光谱 

分 类 号：TQ171.1[化学工程—玻璃工业]