Tuning thermal decomposition of ammonium perchlorate by nanoporous Gd2O3 for improved safety and enhanced propellant efficiency  

作　　者：Xuezhen Zhou Chunyan Hu Xiaojun Liu Weifan Chen Qun Tang Yongxiu Li 

机构地区：[1]Research Center for Rare Earths&Nano/micro Functional Materials,Nanchang University,Nanchang 330047,China [2]Jiangxi Agricultural University,Nanchang 330045,China

出　　处：《Journal of Rare Earths》2020年第1期108-112,共5页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(51864033,51274123,21761020);the National Key Basic Research Program of China(973 Program,2012CBA01204);Jiangxi Provincial Scientific&Technological Support Project of China(20132BBE500041)

摘　　要：Nanoporous Gd2O3 powders(NGPs) with different specific surface areas were prepared by a nonaqueous sol-gel method and utilized to tune the exothermal decomposition of ammonium perchlorate(AP) for enhanced propellant efficiency and improved safety.It is found that with the increasing dosage of NGPs into AP,the two exothermal peaks of AP merge into one intense exothermal peak,indicating that an "energy stacking" has been achieved.Meanwhile,the unique delay of the first exothermal peak of AP is conducive to the safety of AP in application process.Furthermore,the dependence of decomposition heat of AP on dosage and calcination temperature is more evident than on the surface areas of NGPs,suggesting that the promotion effect of NGPs on the thermal decomposition of AP does not only rely on the surface interaction.Therefore,an electron transfer mechanism is proposed to illustrate the decomposition process of AP tuned by NGPs.Nanoporous Gd2O3 powders（NGPs） with different specific surface areas were prepared by a nonaqueous sol-gel method and utilized to tune the exothermal decomposition of ammonium perchlorate（AP） for enhanced propellant efficiency and improved safety.It is found that with the increasing dosage of NGPs into AP,the two exothermal peaks of AP merge into one intense exothermal peak,indicating that an "energy stacking" has been achieved.Meanwhile,the unique delay of the first exothermal peak of AP is conducive to the safety of AP in application process.Furthermore,the dependence of decomposition heat of AP on dosage and calcination temperature is more evident than on the surface areas of NGPs,suggesting that the promotion effect of NGPs on the thermal decomposition of AP does not only rely on the surface interaction.Therefore,an electron transfer mechanism is proposed to illustrate the decomposition process of AP tuned by NGPs.

关 键 词：Nanoporous Gd2O3 powders Thermal decomposition Ammonium perchlorate Electron transfer mechanism Rare earths 

分 类 号：TB383.1[一般工业技术—材料科学与工程] V512[航空宇航科学与技术—航空宇航推进理论与工程]