【摘 要】
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New polyoxometalate α-K12H3[Y(BW11O39)2]·25H2O was synthesized and treated by high temperature gaseous rare earth permeation to prepare tungsten bronze K0.475
【机 构】
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Department of Applied Chemistry
论文部分内容阅读
New polyoxometalate α-K12H3[Y(BW11O39)2]·25H2O was synthesized and treated by high temperature gaseous rare earth permeation to prepare tungsten bronze K0.475WO3. XRD, TG-DTA, XPS, 183W-NMR,CV and AC impedance spectra were used to characterize the resulting material. The results of XPS indicate that La has permeated and diffused into the body of the sample and exists in the forms of binding with other components. The crystal structure parameters of K0.475WO3 were obtained by the analysis of XRD, which shows tetragonal crystal system with lattice parameters: a=12.28 nm, c=3.833 nm, V=578.48 nm-3. The conductivities calculated from the results of AC impedance spectra of the material increase with the increasing of temperature, which shows a semiconductor character.
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