Progressive Burning Performance of Deterred Oblate Spherical Powders with Large Web Thickness

摘要

In order to obtain progressive burning of single-base oblate spherical powders with a large web thickness, an internal porous structure and outer deterred shell are introduced into its preparation and deterring process. The preparation process comprised pore-making, sphere-shaping, shell forming and the subsequent deterring of outer surface of single-base oblate spherical powders. The combustion characteristics of prepared single-base oblate spherical powders with a large web thickness were tested by closed bomb tests. The influence of the type and content of deterrent, i.e. the small molecular weight deterrent dibutyl phthalate (DBP) and polymer deterrent poly(ethylene glycol dimethacrylate) (PEGDMA), and the preparation parameters on the burning progressivity were investigated. It was shown that a progressive burning single-base oblate spherical powder can be prepared by the methods described in this study.