非水解溶胶-凝胶法低温合成硅酸锆  

LOW TEMPERATURE SYNTHESIS OF ZIRCON BY A NONn-HYDROLYTIC SOL-GEL ROUTE

作　　者：江伟辉[1] 周艳华[1] 魏恒勇[1] 彭永烽[1] 

机构地区：[1]景德镇陶瓷学院,景德镇333000

出　　处：《中国陶瓷》2008年第7期20-22,共3页China Ceramics

基　　金：教育部"新世纪优秀人才计划"(NCET-05-0578);国家自然科学基金(50762005)资助项目

摘　　要：以工业纯ZrCl4、Si(OC2H5)4为前驱体,通过非水解溶胶-凝胶法合成了硅酸锆。采用DTA-TG和XRD等测试手段研究了凝胶热处理过程中的物相变化。结果表明:当前驱体溶胶中未引入矿化剂时,硅酸锆的合成温度高达1450℃;相比之下,溶胶中引入矿化剂LiF后在600℃下便开始出现了ZrSiO4衍射峰,在700℃合成的硅酸锆不仅合成率高,而且晶体发育好,实现了低温合成硅酸锆的目标。zircon has been synthesized by the non-hydrolytic sol-gel route using zirconium tetrachloride and tetraethoxysilane as precursors. The phase transformations of xerogels during the heat treatment were studied by DTA-TG and XRD. The results show that the synthesis temperature of zircon is as high as 1450℃ without the introduction of any mineralizers to precursor sols and that after adding lithium fluoride as minerilizer to the sols, the diffraction peak of zircon appears at 600℃ , and the zircon synthesized at 700℃ not only has high synthesis rate, but also shows good crystal growth, so the low temperature synthesis of zircon comes true.

关 键 词：非水解溶胶—凝胶法 硅酸锆 矿化剂 氟化锂 

分 类 号：TQ223.121[化学工程—有机化工] TQ174.43