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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 14    No. 6    December 2004

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Influences of dehydrating process on properties of ATO nano-powders
WU Xiang-wei(吴湘伟)1, CHEN Zhen-hua(陈振华)2, HUANG Pei-yun(黄培云)1

1. School of Materials Science and Engineering, Central South University, 
Changsha 410083, China;
 2. School of Materials Science and Engineering, Hunan University,
 Changsha 410083, China

Abstract: Sb-doped SnO2 (ATO) nanometer powders were synthesized by hydrolysis of alkoxides, using SnCl4•5H2O and SbCl3 as raw materials. Some dehydrating processes, such as n-butanol/xylene mixed solvent heterogeneous azeotropic distillation, organic dehydrating agent and other dehydrating processes, were used to treat the wet colloids for preparing nonagglomerated ATO nanoparticles. The influences of dehydrating processes on the particle size, agglomeration and resistance were investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM) and Brunauer-Emmet-Teller(BET). It is indicated that the dehydrating methods have great influences on the products properties, and that n-butanol/xylene mixed solvent heterogeneous azeotropic distillation processing and organic dehydrating agent can  effectively remove the residual H2O molecules in wet colloids, and be used to prepare powders with high surface areas, about 85.32m2/g, low agglomeration and good conductivity.

 

Key words:  ATO; conductive nanometer-sized powder; agglomeration; dehydration

ISSN 1672-7029
CN 43-1423/U

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