中国陶瓷--工艺参数对制备硅酸锆晶须影响.docxVIP

 PAGE \* MERGEFORMAT 8 工艺参数对制备硅酸锆晶须的影响 刘健敏1，张涛2,3，江伟辉1,2，冯果1，苗立锋1，陈婷1，高启蔚 2 (1. 国家日用及建筑陶瓷工程技术研究中心，江西景德镇 333001; 2. 景德镇陶瓷大学材料科学与工程学院，江西景德镇 333001; 3. 江西陶瓷工艺美术职业技术学院材料与机械工程学院，江西景德镇 333001) 摘 要：本文以无水四氯化锆为锆源、正硅酸乙酯为硅源、无水乙醇为溶剂、钼酸钠为熔盐介质，采用非水解溶胶-凝胶工艺结合熔盐法制备硅酸锆晶须，借助XRD、SEM和TEM等测试手段研究了矿化剂LiF的引入、熔盐用量等工艺参数对制备硅酸锆晶须的影响。研究结果表明：矿化剂LiF的引入并没有促进硅酸锆晶须的一维生长，相反还导致硅酸锆晶体的二维甚至三维生长；熔盐用量过多或过少均不利于硅酸锆晶须的形成；未添加矿化剂LiF，干凝胶粉与熔盐质量比为1:1时可获得产率高、???径比达 15~20且沿c轴方向定向生长的硅酸锆晶须。 关键词：非水解溶胶-凝胶工艺；熔盐法；硅酸锆；晶须 中图分类号：TQ174 文献标志码：A The influences of process parameters on the preparation of zircon whisker LIU Jianmin1, Zhang Tao2,3, JIANG Weihui1,2,FENG Guo1, MIAO Lifeng1, Chen Ting1,Gao Qiwei2 (1.National Engineering Research Center for Domestic and Building Ceramics, Jingdezhen 333000, Jiangxi, China; 2. School of Material Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333000, Jiangxi, China; 3. School of Material Science and Engineering, Jiangxi Ceramic Fine Art Profession Academe, Jingdezhen 333000, Jiangxi, China;) Abstract: Zircon whiskers were synthesized by a non-hydrolytic sol-gel process combined with a molten salt method withanhydrous zirconium tetrachloride as zirconium source, tetraethyl orthosilicate (TEOS) as silicon source, anhydrous ethanol as solvent, and sodium molybdate as molten salt in this paper. the influences of the introduction of mineralization LiF, the amount of molten salt on the preparation of zircon whisker were investigated by XRD、SEM and TEM, etc. The results show that the introduction of the mineralized LiF does not promote the growth of the zircon whisker, On the contrary, it also leads to the two-dimensional or even three-dimensional growth of zircon crystals; Too much or too little molten salt is not conducive to the formation of zircon whisker; When mineralization LiF is not introduced , and the mass ratio of dry gel powder to molten salt is 1:1, zircon whiskers elongated along the growth direction of c axis with high yield and the aspect ratio of 15–2