Role of binders in reactive composites: A case study with spherical B/Pb_(3)O_(4) particles  

作　　者：Fan Wang Shanghao Du Jiahui Yang Zhihua Xue Jiafei Li Chongwei An Jingyu Wang Bidong Wu 

机构地区：[1]School of Environment and Safety Engineering,North University of China,Taiyuan,030051,China

出　　处：《Particuology》2024年第10期170-179,共10页颗粒学报（英文版）

基　　金：supported by National Natural Science Foundation of China(grant No.22005275).

摘　　要：The strategic selection of appropriate preparation methods and binder strategies is crucial for enhancing the particle and combustion performance of pyrotechnic delay compositions(PDCs).This study,utilizing droplet microfluidics technology(DMT)and micron-scale raw materials,prepared spherical B/Pb_(3)O_(4) composite particles with varying concentrations of fluorine rubber(F_(2604)).The morphology,specific surface area,bulk density,flowability,friction sensitivity,thermal decomposition,and combustion performance of these microspheres were characterized.The results indicate that as the binder content increases,the particle size of the microspheres first decreases and then increases,the specific surface area decreases,and the bulk density increases,correlating with tighter binding of the reactant powders by the binder.Furthermore,tighter powder-to-powder binding results in a progressive decrease in the thermal decomposition peak temperature of the samples(from 404.2℃ to 346.4℃).Additionally,increased binder content reduces the friction sensitivity and combustion rate of the samples,which is attributed to the energy absorption properties of the binder.Compared to the control group,the microsphere samples exhibit significantly enhanced bulk density,flowability,friction safety,and combustion delay precision,potentially improving the reliability of PDCs in ignition sequences.

关 键 词：Pyrotechnic delay composition Droplet microfluidic technology Particle BINDER B/Pb_(3)O_(4) Combustion performance 

分 类 号：TB33[一般工业技术—材料科学与工程]