Preparation of a nano-sized α-Al2O3 powder from a supersaturated sodium aluminate solution

被引：23
|
作者：
Li, Hui
Lu, Hongxia
Wang, Song
Jia, Janfeng
Sun, Hongwei
Hu, Xing [1 ]
机构：
[1] Zhengzhou Univ, Sch Phys Engn, Zhengzhou 450052, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2009年 / 35卷 / 02期
关键词：
Alumina; Sodium almninate solutions; Seeds; SYNTHETIC BAYER LIQUORS; OXALIC-ACID; AL(OH)(3); GROWTH; CRYSTALLIZATION; PRECIPITATION; NUCLEATION; GIBBSITE; BOEHMITE; TRANSFORMATION;
D O I：
10.1016/j.ceramint.2008.01.030
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Nano-sized alpha-Al2O3 particles with an average size of 30-40 nm were prepared successfully from supersaturated sodium aluminate solution with liquid-attached aluminum hydroxide and nano-sized alpha-Al2O3 as seeds as well as a reasonable amount of PEG20000 as surfactant. The powders were characterized by differential scanning calorimetry (DSC)/thermogravimetry (TG), scanning electron microscopy (SEM) and X-ray diffraction (XRD). It was found that liquid-attached AI(OH)3 and nano-sized a-At,03 seeds can accelerate the precipitating process and reduce the alpha-Al2O3 particles size. (C) 2008 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：901 / 904
页数：4
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