Synthesis of Nanocrystalline α-Al2O3 from Nanocrystalline Boehmite Derived from High Energy Ball Milling of Gibbiste

被引：5
作者：
Udhayabanu, V. [1 ,2 ]
Murty, B. S. [2 ]
机构：
[1] PSG Coll Technol, Dept Met Engn, Coimbatore 641004, Tamil Nadu, India
[2] Indian Inst Technol, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India
来源：
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS | 2011年 / 64卷 / 06期
关键词：
Ceramics; Kinetics; Electron microscopy; Electronic materials; Nanomaterials; X-ray techniques; GIBBSITE; TRANSFORMATION; BEHAVIOR;
D O I：
10.1007/s12666-011-0086-5
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Dry milling of gibbsite has been carried out for 5 h in planetary ball mill to study the effect of mechanical activation on alpha-Al2O3 formation. Gibbsite undergoes phase transformation during milling and has resulted nanocrystalline boehmite after 5 h of milling. The average crystallite size and the BET surface area of the nanocrystalline boehmite resulted by 5 h milling of gibbsite are 8 nm and 140 m(2)/g, respectively. The nanocrystalline boehmite has shown reduction in the alpha-Al2O3 formation temperature as well as in the activation energy of alpha-Al2O3 formation. The average crystallite size of nanocrystalline boehmite derived alpha-Al2O3 is measured to be 100 nm by TEM analysis and the BET surface area of resulted nanocrystalline alpha-Al2O3 is 12 m(2)/g.
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页码：535 / 540
页数：6
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