Sol-Gel水热偶合法制备纳米AlOOH的晶相转变  

Transformation of Crystillion AlOOH Prepared by Sol-Gel and Hydrothermal Treatment

作　　者：刘昌华[1] 廖海达[2] 龙翔云[3] 

机构地区：[1]西南师范大学化学化工学院,重庆400715 [2]广西民族学院化学化工系,南宁530006 [3]广西大学化学化工学院,南宁530004

出　　处：《中南民族大学学报（自然科学版）》2004年第1期18-20,共3页Journal of South-Central University for Nationalities：Natural Science Edition

摘　　要：以日本理学 30 1 5 X射线衍射仪研究了 Sol- Gel水热偶合法制备纳米 Al OOH的晶相转变 .(1 )在 p H3.5、时间 5 h、温度低于 1 30℃时 ,主要生成三水铝 ;当温度高于 1 30℃且升高至 1 5 0℃时 ,三水铝完全转化为 Al OOH;(2 )在 p H3.5、温度 1 5 0℃、时间小于 3h时 ,物相以三水铝和 Al OOH共存 ,随时间延长至 5 h,三水铝完全转化为Al OOH;(3)在反应温度 1 5 0℃、时间 5 h、p H>8.0时 ,三水铝的含量随 p H的增大而增加 ,p H<6 .0才能转化为Al OOH.The transformation of crystalline AlOOH prepared by Sol gel and hydrothermal treatment was investigated by means of X ray powder diffractometer (Japan science, 3015). Firstly, the pH was adjusted to 3.5, the reaction time was fixed as 5 h, the particle phase was mainly gibbsite under 130 ℃, conversion of gibbsite to boehmite occurred drastically at above 130 ℃ to 150 ℃. Secondly, the pH was adjusted to 3.5,the reaction temperature was fixed as 150 ℃, the particle was a mixture of gibbsite and boehmit at blow 3 h, gibbsite conversion to boehmit occurred drastically at above 3 h to 5 h. Finally, the reaction temperature was fixed as 150 ℃, the reaction time was fixed as 5 h, the particle phase was mainly gibbsite when the pH>8.0,gibbsite conversion to boehmit was possible only when the pH<6.0.

关 键 词：氢氧化铝 纳米粉体 溶胶-凝胶法 水热法 晶相 

分 类 号：TB383[一般工业技术—材料科学与工程]