Highly dispersed perovskite NdCoO<,3> nanoparticles were prepared by a novel salt-assisted combustion process. The effects of NaCl content and calcination temperature on the characteristics of the products were characterized by X-Ray Diffraction (XRD), Transmission Electron Microscopy (TEM) and BET surface area measurement. The facile introduction of NaCl in the conventional combustion synthesis process was found to result in the formation of well- dispersed perovskite nanoparticles and increase specific surface areas of the resultants from 1.7 to 43.2m<2>·g<-1>. The catalytic properties of the typical NdCoO <,3> samples for thermal decomposition of ammonia perchlorate (AP) and their correlation with the NdCoO<,3> microstructure were investigated by Differential Scanning Calorimetry (DSC). The DSC results indicate that the addition of the amorphous NdCoO<,3> nanoparticles to AP incorporates two small exothermic peaks of AP into a strong exothermic peak, decreases the temperature of the AP exothermic peak to 314.0℃ by reduction of 138.3℃ and increases the apparent decomposition heat from 515J·g <,-1> to over 1441J·g<,-1>, showing the intense catalytic activity for thermal decomposition of AP. It is also clear that the catalytic activity of the resultant NdCoO<,3> is related to their microstructure. According to Kissingers method, the kinetics parameters of the thermal decomposition of AP catalyzed by the as-prepared NdCoO <,3> samples were calculated to account for the order of their catalytic activity.
Chen Weifan(陈伟凡) Liu leili(刘磊力) Li Fengsheng(李凤生) Li Yongxiu(李永绣) Li Huiquan(李慧泉)
School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China College of Chemical Engineering, Shandong Institute of Light Industry, Jinan 250100, China National Special Superfine Powder Engineering Research Center, Nanjing University of Science & Techn Chemistry Department, Fuyang Normal College, Fuyang 236041, China