论文部分内容阅读
The mechanism and influence factors of thermal decomposition of NH_4VO_3 in Ar to produce V_6O_(13)were investigated by TG-DTG, DSC, X-ray diffraction and orthogonal design experiments at 25～450℃.Theprocess includes four reactions, among which the reduction of V_2O_5 by NH_3 is one of the most importantstagrt controlling the constituents of the fina1 products, and it is affected by heating rate and amount ofNH_4VO_3 singnificantly. This reduction reaction is controlled by a first order reaction or nucleation and nucleigrowth with a kinetic equation--ln(l-a)=kt,and apparent activation energy of 410kJ/molis obtained.
The mechanism and influence factors of thermal decomposition of NH_4VO_3 in Ar to produce V_6O_ (13) were investigated by TG-DTG, DSC, X-ray diffraction and orthogonal design experiments at 25 ~ 450 ° C. of V_2O_5 by NH_3 is one of the most importantstagrt controlling the constituents of the fina1 products, and it is affected by the heating rate and amount ofNH_4VO_3 singnificantly. This reduction reaction is controlled by a first order reaction or nucleation and nucleigrowth with a kinetic equation-- ln (la) = kt, and apparent activation energy of 410kJ / molis obtained.