Synthesis, characterization, and thermodynamic parameters of vanadium dioxide

被引：38
|
作者：
Qi, Ji [1 ,2 ]
Ning, Guiling [1 ]
Lin, Yuan [1 ]
机构：
[1] Dalian Univ Technol, Sch Chem Engn, Dept Chem Engn Mat, Dalian 116012, Peoples R China
[2] Dalian Natl Univ, Dalian Life Sci Coll, Dept Chem Engn, Dalian 116600, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 2008年 / 43卷 / 8-9期
关键词：
oxides; chemical synthesis; differential scanning calorimetry (DSC); X-ray diffraction; microstructure;
D O I：
10.1016/j.materresbull.2007.08.016
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel process was developed for synthesizing pure thermochromic vanadium dioxide (VO2) by thermal reduction of vanadium pentoxide (V2O5) in ammonia gas. The process of thermal reduction of V2O5 was optimized by both experiments and modeling of thermodynamic parameters. The product VO2 was characterized by means of X-ray diffraction (XRD), X-ray photoelectron spectrometry (XPS), scanning electron microscopy (SEM), thermogravimetric analysis (TG), and differential scanning calorimetry (DSC). The experimental results indicated that pure thermochromic VO2 crystal particles were successfully synthesized. The phase transition temperature of the VO2 is approximately 342.6 K and the enthalpy of phase transition is 44.90 J/g. (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2300 / 2307
页数：8
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