纳米钛酸锌的制备及其对AP热分解性能的影响

Preparation of Nanometer ZnTiO_3 and Its Effect on Thermal Decomposition of Ammonium Perchlorate

以四氯化钛、六水硝酸锌为原料,碳酸铵为沉淀剂,制备了纳米ZnTiO3的粉体,用X射线衍射、红外光谱和透射电镜等对产物进行表征,用差热分析考察了纳米ZnTiO3对高AP热分解的催化作用。结果表明,在550℃可制得结晶良好的立方相纳米ZnTiO3,呈球形或近似球形,粒径约100nm。在AP中加入质量分数5%的纳米ZnTiO3,AP的低温和高温热分解峰分别提前约18.3℃和25.1℃;提高纳米ZnTiO3的含量可以增强对AP高温热分解反应的催化作用,阻碍AP的低温热分解。

Nanometer ZnTiO3 powders were prepared by precipitation method,using TiCl4,Zn（NO3）2·6H2O and （NH4）2CO3 as primary materials.The prepared ZnTiO3 nanocrystals were characterized by XRD,FTIR and TEM.And the catalytic performance of ZnTiO3 nanocrystals for the ammonium perchlorate （AP） decomposition was investigated by DTA.ZnTiO3 with pure cube structure can be synthesized at 550℃ by this procedure.The powders was spheroid with particle size of about 100nm.The low and high temperature decomposition peaks of AP were decreased by 18.3℃ and 25.1℃ respectively when adding 5% nanoparticle ZnTiO3 powder.With increasing ZnTiO3 nanocrystals content in AP,the catalytic effects of ZnTiO3 powders on the high temperature decomposition of AP are enhanced and the catalytic effects of the low temperature decomposition of AP are decreased.