Structural Analysis and Electrical Property of Tungsten BronzePrepared by Rare Earth Gaseous Permeation

【Author】

Li Zhonghua, Li Xin Chen Gang~*,Su Minghan, Wei YongdeDepartment of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China)

【Abstract】

The cubic sodium tungsten bronzes, Na_xWO_3(x=0.854 and 0.814)were prepared by rare earths gaseous permeation method. Structural analysis was carried out by Rietveld method from powder X-ray diffraction data. The X-ray diffraction profile calculated with cubic P32 models are in good agreement with the observed X-ray diffraction patterns. There is only a little difference in W-O bond and Na-O bond between Na_(0.854)WO_3 and Na_(0.814)WO_3. Conductivity measurements indicate that Na_xWO_3 show anomalous semiconducting behavior and percolation model was used to interpret it.

【Keywords】

sodium tungsten bronze; rare earths gaseous permeation; structural analysis; conductivity;rare earths

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