非水解溶胶-凝胶法结合熔盐工艺制备硅酸锆晶须

发布时间：2018-03-12 07:25

本文选题：非水解溶胶-凝胶法　切入点：熔盐工艺　出处：《陶瓷学报》2017年04期 　论文类型：期刊论文

【摘要】：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-凝胶法结合熔盐工艺制备硅酸锆晶须,借助XRD、SEM和TEM等测试手段研究了矿化剂Li F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Li F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Li F,干凝胶粉与熔盐质量比为1:1时可获得产率高、长径比达15-20且沿c轴方向定向生长的硅酸锆晶须。
[Abstract]:Zirconium silicate whiskers were prepared using anhydrous zirconium tetrachloride as zirconium source, ethyl orthosilicate as silicon source, anhydrous ethanol as solvent and sodium molybdate as molten salt medium. The effects of the addition of mineralizer Li F and the amount of molten salt on the preparation of zirconium silicate whisker were studied by means of TEM and SEM. The results showed that the introduction of the mineralizer Li F did not promote the one-dimensional growth of zirconium silicate whisker. On the contrary, the growth of zirconium silicate crystals in two or even three dimensions is also caused, too much or too little molten salt is not conducive to the formation of zirconium silicate whiskers, and when the ratio of xerogel powder to molten salt is 1: 1, the yield of zirconium silicate whiskers is high without adding the mineralizer Li F, and the ratio of dry gel powder to molten salt is 1: 1. Zirconium silicate whiskers with long diameter Prida 15-20 and directional growth along c axis.
【作者单位】：国家日用及建筑陶瓷工程技术研究中心;景德镇陶瓷大学材料科学与工程学院;江西陶瓷工艺美术职业技术学院材料与机械工程学院;
【基金】：国家自然科学基金(51402135,51362014) 江西省优势科技创新团队建设计划项目(20133BCB24010) 江西省教育厅基金(GJJ150887,GJJ150919)
【分类号】：TQ134.12

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