摘要
本文应用溶胶凝胶技术合成了钛酸铝陶瓷粉料，由铝和钛的金属有机化合物水解和缩聚反应制取凝胶，研究确定了室温下合适的水／醇盐摩尔比、溶剂、醇盐浓度和适宜的催化剂；给出了凝胶的非晶态粉料的比表面积，ＤＴＡ，ＴＧ，结果以及用ＸＲＤ跟踪结构的变化。并分别在７１０℃和９１０℃开始发现ＴｉＯ_２（金红石）和ａ－Ａｌ_２Ｏ_３晶相．在１２００～１３００℃温度区间开始Ａｌ_２Ｏ_３和ＴｉＯ_２转变成Ａｌ_２ＴｉＯ_５。
In this paper,Aluminium titanate ceramic powders are synthesized by the sol-gel process. The binary gel is obtained by hydrolysis and polycondensation reactions of organometallic compounds of aluminium and titanium. The water-to-metal-alkoxide ratio solvents concentration of metal alkoxide and catalyst are at best values. The special surface area ofthe dried gels measured by BET. The thermal evolution of amorphous powders is followed by DTA and TG measurements. Structural evolution is followed by using X-ray diffraction.The crystallization of the TiO2 rutile and Al2O3 corindon starts 710 and 910℃ respectively.The transformation of Al2O3 and TiO2 into Al2TiO5 appears between 1200 and 1300℃.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
1994年第3期53-58,共6页
Journal of Lanzhou University(Natural Sciences)
基金
国家自然科学基金
关键词
溶胶凝胶法
钛酸铝
陶瓷粉末
titanium compounds
sol-gel process
ceramic powder
