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论文类型：期刊论文

发表时间：2010-08-20

发表刊物：JOURNAL OF ALLOYS AND COMPOUNDS

收录刊物：SCIE、EI、Scopus

卷号：504

期号：2

页面范围：503-507

ISSN号：0925-8388

关键字：Vanadium oxide; Tungsten; Doping; Thermal reduction

摘要：Thermochromic tungsten-doped vanadium dioxide (VO(2)) powders were successfully synthesized by thermal reduction using V(2)O(5) as a vanadium precursor. The products were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). The results indicated that W was successfully doped into the crystal lattice of VO(2) matrix, and prepared tungsten-doped VO(2) had a rod-like morphology. The effects of reducing temperature and annealing temperature on the crystallographic structures were also discussed. The phase transition temperature (Tt) of VO(2) could be simply tuned by changing the doping concentration of tungsten. When the doping concentration was 1.58 mol%, the Tt could be reduced to 37.8 degrees C from initial 69.5 degrees C, suggesting that tungsten-doped VO(2) possesses prominent thermochromic properties and optical switching characters. It has shown that this convenient and efficient approach could be applied in the mass-production of functional powders materials. (C) 2010 Elsevier B.V. All rights reserved.