| In this paper, the reaction precursors of Cu-Mn complex oxides nanometer powder were synthesized by solid-solid state synthesis method of the system with crystalline water and without crystalline water at room temperature, Technical conditions and the precursors kinetics were studied.The Cu-Mn complex oxides nanometer powder were synthesized by solid-solid state reaction of Cu(CH3COO)2H2O with Mn(CH3COO)2-4H2O and H2C2O4-2H2O at room temperature. The influences of microwave power and heat time, decomposing temperature and decomposing time on particle size were investigated by means of uniform design. The results showed that product diameter was mostly influenced by decomposing temperature, followed by microwave power, microwave heat time, decomposing time. The optimum conditions were microwave power=540W, microwave heat time =15.0min, decomposing temperature =370°C, decomposing time =2.Oh. Under these conditions Cu1.5Mn1.5O4 nano-particles with average diameter of 16.9nm and crystal form of cubic and space group of Fd3m were obtained.The Cu-Mn complex oxides nanometer powder were synthesized by solid-solid state reaction of Cu2(OH)2CO3 with MnCO3 and H2C2O4-2H2O at room temperature. The influences of Cu-Mn molar ratio in the raw material, decomposing temperature and decomposing time on particle size were investigated by means of orthogonal experimental design. The results showed that product diameter was mostly influenced by decomposing temperature, followed by decomposing time, Cu-Mn molar ratio in the raw material. The optimum conditions were m(Cu):m(Mn)=l/2, decomposing temperature =400℃, decomposing time =2.0h. Under these conditions Cu0.425 Mn0.549 O2 nano-particles with average diameter of 11.7nm and crystal form of cubic and space group of Fd3m were obtained.Moreover, TG-DTA and DSC chemical reaction kinetic theory was employed here, and the Ozawa integral method and Coats-Redfern integral method were used. After the calculation and comparison, activation energy and reaction order in heat... |
