The Effect of Nano Metal Powders on the Thermal Decomposition Kinetics of Ammonium Perchlorate
- Received Date: 2003-06-05
- Nano metal powder, Nanonickel powder, Ammonium perchlorate, Thermal decomposition kinetics /
Abstract: The thermal decomposition characteristics of general ammonium perchlorate (g-AP) influenced by the addition of aluminum, nickel with different particle sizes (general and nano) are studied by TG and DSC. The results show that aluminum powders (both general and nano size) are nearly uninfluenced. Nano nickel powders have the greatest influence on the decomposition properties of g-AP among metal powders. Such accelerating effects of nanonickel powders are more apparent on the stage of high temperature decomposition than low temperature decomposition of g-AP and will be weakened with the decrease of the content of nanonickel. Nanonickel powders are also more effective than super fine nickel powders on accelerating the thermal decomposition of superfine AP (s-AP). The kinetic parameters of the thermal decomposition of s-AP and mixture of s-AP and nano nickel powders are obtained from the TG-DTG curves bythe integral method based on the Coats-Red fern equation. Nanonickel powders reduce the apparent activation energy of the thermal decomposition of s-AP from 157.9 kJ/mol to 134.9 kJ/mol. The most probable mechanism functions of the thermal decomposition reaction for s-AP and mixture of s-AP and nano nickel powders both belong to systems of Avrami-Erofeev equations. The mechanism of such accelerating effects has been discussed.
|Citation:||Li Shufen, JiangZhi, Zhao Fengqi, Liu Ziru, Yin Cuimei, Luo Yang, Li Shangwen. The Effect of Nano Metal Powders on the Thermal Decomposition Kinetics of Ammonium Perchlorate[J]. Chinese Journal of Chemical Physics , 2004, 17(5): 623-628. doi: 10.1088/1674-0068/17/5/623-628|