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-凝胶工艺结合熔盐法制备硅酸锆晶须,研究熔盐存在条件下硅酸锆干凝胶的物相转变以及熔盐的引入、热处理温度及保温时间等对硅酸锆晶体一维择优生长的影响。熔盐的加入不仅降低了硅酸锆的合成温度,而且对其一维生长有明显促进作用;热处理温度过高或过低、保温时间过长或过短均不利于硅酸锆晶须的形成。850℃保温3 h能制备出产率高、直径在50~100 nm,长径比为20~30、沿[001]方向择优生长的硅酸锆晶须。
Zircon whiskers were synthesized by a non-hydrolytic sol-gel process combined with a molten salt method with anhydrous zirconium tetrachloride as zirconium source,tetraethylorthosilicate(TEOS) as silicon source,anhydrous ethanol as a solvent,sodium molybdate as a molten salt.The phase transition of zircon dry gel in the presence of the molten salt as well as the influences of molten salt,heat treatment temperature and holding time on the one-dimensional preferential growth of zircon crystal were investigated.The results show that the presence of molten salt can reduce the synthesis temperature of zircon and promote the one-dimensional growth of zircon.The zircon whiskers along the growth direction of [001],the diameter of 50–100 nm and the aspect ratio of 20–30 can be synthesized at 850 ℃ for 3h.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2015年第6期798-802,共5页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(51162013
51362014)
江西省主要学科学术和技术带头人培养计划(20113BCB22009)
江西省博士后研究人员择优资助项目(2013KY34)资助
关键词
硅酸锆
晶须
非水解溶胶-凝胶工艺
熔盐法
zircon
whisker
non-hydrolytic sol-gel process
molten salt method
