醇盐水解法制备铝酸镧粉体  

The Synthesis of Lanthanum Aluminate Powders by Alkoxide-Hydrolysis

作　　者：王修慧[1] 吴晓琳[2] 翟玉春[1] 高宏[2] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110006 [2]大连交通大学材料科学与工程学院,辽宁大连116028

出　　处：《稀有金属材料与工程》2007年第A01期62-64,共3页Rare Metal Materials and Engineering

摘　　要：采用金属与醇直接反应制得金属醇盐,经水解、干燥、焙烧,最终制得LaAlO3粉体。实验证明,金属镧、铝与醇直接反应可制得镧铝双金属醇盐。经过TG、XRD、SEM分析可得知水解过程、相转变、晶粒大小等信息。油酸的加入可降低醇盐活性,可控制水解反应速度;在TG曲线上,到600℃左右,湿凝胶几乎停止失去结构水,凝胶趋于转化完全;XRD表明,在900℃条件下焙烧,可得到LaAlO3,且晶型发育较完好,且为立方相;焙烧温度到1000℃时,晶粒发育完善;由谢乐公式计算,晶粒尺寸为80nm左右;经SEM观察,粉体颗粒呈规则的立方体。The preparation of LaAlO3 by the way of alkoxide-hydrolysis was reported. From theory analysis, double metal alkoxide can be obtained by lanthanum and aluminum co-reacting with isopropanol. The samples have been investigated with TG, XRD, SEM for dehydrating, phase transition, crystal particle size, morphology etc. Adding oleic acid could reduce the activity of alkoxide, and speed of alkoxide-hydrolysis reaction could be controlled. From TG curve, gel stopped to lose structure H2O at 600 ℃. Powder roasted at 900 ℃ is consistent with the standard figure. And at 1000 ℃, perfect phase can be obtained. By Sharre formula, crystal particle size is about 80nm. The particle is cubic in shape from SEM.

关 键 词：醇盐水解 铝酸镧 粉体 

分 类 号：TB383.3[一般工业技术—材料科学与工程]