文献类型：期刊文献

英文题名：Influences of antimony concentration on nanometer-sized tin dioxide powders

作者：Li, QS; Zhang, JC; Song, L; Yuan, SQ; Wang, J

机构：[1]E China Univ Sci & Technol, Dept Sci & Engn Mat, Shanghai 200237, Peoples R China

年份：2002

卷号：17

期号：6

起止页码：1283

外文期刊名：JOURNAL OF INORGANIC MATERIALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000179499800033)】；

语种：英文

外文关键词：nanometer-sized antimony-doped tin dioxide powders; antimony concentration; properties of antimony-doped tin dioxide powders

摘要：Nanometer-sized antimony-doped tin oxide powders were prepared by coprecipitation using SnCl4.5H(2)O and SbCl3 as starting materials. The characteristics of the powders were investigated by X-ray diffraction (XRD), transmission electron microscope (TEM) and differential thermal analysis (DTA). The influences of antimony concentration on the phase, particles size and powders resistance were researched. The results indicate that samples with lower Sb concentration (x less than or equal to 0.462) are tetragonal SnO2 phases with Sb atoms as the solute in the lattice while Sb atoms are separated from tetragonal SnO2 phases and oxidized into Sb2O4 phase in samples with higher Sb concentration(x > 0.519); Doped Sb plays the role of reducing SnO2 crystallite size and restrains the crystallite growth during heat treatment, and the particle size is insensitive to Sb concentration when Sb concentration is above 0.181; the electric conductivity of SnO2 powders increases with increasing Sb concentration and reaches a maximum at x=0.095, and the resistance of samples increases rapidly at x > 0.245. The optimal range of Sb concentration is 0.181similar to0.230.