A facile synthesizing method of vanadium dioxide by pyrolyzing ammonium metavanadate

• Autorzy: Qi J. , Ning G. , Hua R. , Tian M. , Liu S.
• Języki publikacji: EN

Abstrakty

EN

A facile process was developed for synthesizing vanadium dioxide (VO2) by pyrolyzing ammonium metavanadate (NH4VO3) in nitrogen flow. The process was designed on the base of thermodynamic modeling of chemical reaction and thermal analyzing of NH4VO3 pyrogenation in N2 gas, and optimized by experiments. X-ray diffraction (XRD), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) were applied to characterizing the product VO2. Thermo-gravimetric analysis (TG) and DSC were used for analyzing the process of NH4VO3 pyrogenation. The experimental results indicated that VO2 microcrystal particles were successfully synthesized. The product VO2 presents two kinds of micro morphologies, torispherical and pentagonal prism. The phase transition mainly takes place at 338.4 K and 341.9 K. The average enthalpy of the phase transition is 28.82 J/g.

Słowa kluczowe

EN

vanadium dioxide; ammonium metavanadate; phase transition; microstructure; pyrogenation

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2012
• Tom: Vol. 30, No. 2
• Strony: 151--157
• Opis fizyczny: Bibliogr. 20 poz.

Twórcy

autor

Qi J.

autor

Ning G.

autor

Hua R.

autor

Tian M.

autor

Liu S.

• Department of Chemical Engineering, Life Science College, Dalian Nationalities University, 18 Laohe West Road, Dalian 116600, China

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