Combustion Catalyst And Its Catalytic Performance Of Nano Research

In this dissertation, the prepare of nanometer combustion catalyst and the catalysis of these nanometer materials for energetic material Ammonium perchlorate(AP) thermal decomposition was mainly investigated in order to obtain the more strongly active catalysts and the preparation technology of these nanometer combustion catalysts. Firstly, Nanometer metal oxides CuO, Fe₂O₃, Bi₂O -3 and PbO was prepared by solid state reaction at room temperature, because these metal oxides are usually used in propellants and explosives. The catalysis of these nanometer metal oxides for AP thermal decomposition was investigated by thermal analysis. Results indicate that nanometer CuO, Fe₂O₃ and PbO have catalytic activities except nanometer Bi₂O₃, and nanometer CuO have the more catalytic activities than the others. Nanometer CuO(2wt%) makes the higher temperature peak of AP thermal decomposition drop down 104.04 °C and makes the exothermic quantities of AP thermal decomposition rise from 404.15J/g to 1320J/g. Secondly, the catalysis of nanometer CuO prepared by different methods on AP thermal decomposition was investigated. Results indicate that the nanometer CuO prepared by fast precipitation method has more strongly catalytic activities than the others. The catalysis of nanometer CuO prepared by fast precipitation method in different conditions on AP thermal decomposition was investigated. Results indicate that the nanometer CuO prepared in the condition of room temperature, aging 2h and adding 5wt% polyethylene glycol(PEG) has more strongly catalytic activities. In order to obtain nanometer combustion catalysis with still stronger catalytic activity, nanometer compound metal oxides LaFeO₃ and La-2CuO₄ prepared by co-precipitation method, and their catalytic activities on AP thermal decomposition were investigated. Results indicate that nanometer La-2CuO-4(2wt%) makes the higher temperature peak of AP thermal decomposition drop down 101.15 °C and makes the exothermic quantities of AP thermal decomposition rise from 404.15 J/g to 1220J/g.