XPS Investigation of Segregation of Sb in SnO_2 Powders  

作　　者：王剑华 PENG Guanghuai GUO Yuzhong YANG Xikun 

机构地区：[1]Key Lab of Advanced Material of Yunnan, Kunming University of Science ＆ Technology, Kunming 650093, China [2]Normal College of Gannan, Ganzhou 341000, China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2008年第1期95-99,共5页武汉理工大学学报（材料科学英文版）

基　　金：Science and Technique Foundation of Kunming(No.03H44128)

摘　　要：Antimony doped tin-oxide powders were prepared by controlled precipitation. Surface compositions were determined by X-ray photoelectron spectroscopy （XPS）. The results indicate that enrichment of dopant at the surface of nanoparticles depends on total doping concentration and annealing temperature. Doped antimony shows the tendency to diffuse to surface when annealing at high temperatures. But same amount of Sb atoms are retained on the surface for powders annealing at different temperatures. The higher enrichment at higher temperature is caused by the decreasing of surface areas. Variation of the conductivities of SnO2 powders is also discussed.Antimony doped tin-oxide powders were prepared by controlled precipitation. Surface compositions were determined by X-ray photoelectron spectroscopy （XPS）. The results indicate that enrichment of dopant at the surface of nanoparticles depends on total doping concentration and annealing temperature. Doped antimony shows the tendency to diffuse to surface when annealing at high temperatures. But same amount of Sb atoms are retained on the surface for powders annealing at different temperatures. The higher enrichment at higher temperature is caused by the decreasing of surface areas. Variation of the conductivities of SnO2 powders is also discussed.

关 键 词：tin-oxide XPS nanoparticles surface segregation 

分 类 号：TB383.3[一般工业技术—材料科学与工程]