高等学校化学学报2013，Vol.34Issue(3)：662-667,6.DOI:10.7503/cjcu20120536
铝粉粒度对高氯酸铵热分解动力学的影响
Effect of Aluminum Particle Size on Thermal Decomposition of AP
摘要
Abstract
The effect of aluminum particle sizes of 10. 7 μm, 2. 6 μm and 40 nm on the thermal decomposition of ammonium perchlorate ( AP) was investigated by thermogravimetry-Differential Scanning Calorimetry (TG-DSC). The addition of Al resulted in an increase in the temperature of the low-temperature exothermic peak and a decrease in the temperature of the high-temperature exothermic peak of AP. These changes were more pronounced with an increase in the Al content and a decrease in the aluminum particle size. The processing of non-isothermal data at various heating rates without and with 40% (mass fraction) Al was performed by Netzsch thermokinetics. The dependence of the activation energy calculated by Friedman' s isoconversional method on the conversion degree indicated the decomposition process can be divided into three steps for AP and all the AP/A1 mixtures determined by multivariate non-linear regression. They are C1/D1/D1 (C1; 1st order autocatalysis; D1: one-dimension diffusion reaction) for neat AP, and change to C1/D1/D3(D3: three-dimension Jander diffusion reaction), C1/D1/D4 ( D4; three-dimension Ginst-Broun diffusion reaction) and C1/D1/F2(F2: 2nd order reaction) after addition of 10. 7 μm, 2. 6 μm and 40 nm into AP, respectively.关键词
高氯酸铵/热分解动力学/铝粉/热分解机理Key words
Ammonium perchlorate/ Thermal decomposition kinetics/ Aluminum powder/ Thermal decomposition mechanism分类
化学化工引用本文复制引用
朱艳丽,焦清介,黄浩,任慧..铝粉粒度对高氯酸铵热分解动力学的影响[J].高等学校化学学报,2013,34(3):662-667,6.
