Effects on Burn Rates of Pellets and Propellants with Catalyst-Embedded AP

摘要

This study makes an attempt to demonstrate a technique to embed the catalyst on ammonium perchlorate surface. Inthe present study, various techniques like differential scanning calorimeter, thermogravimetric analysis, scanningelectron microscope, and x-ray computed tomography scan analysis as well as others were used to establish theeffectiveness of this technique. Micron-sized iron oxide was used in this study for embedding the catalyst on ammoniumperchlorate. Burn rates of pellets containing different fractions of iron oxide from various sources were measured toestablish an optimum fraction for highest burn rate of ammonium perchlorate pellets achievable with iron oxide. Theseburn rates were measured using a Crawford bomb, and a fraction of 1 % iron oxide (Sigma-Aldrich) was highest amongthem for pellets. The bum rate of the ammonium perchlorate pellet with 1 % iron oxide at 70 bar pressure recorded was13.33 m m /s. This fraction of iron oxide was also used to study the effect of embedding the catalyst on ammoniumperchlorate surface when used in nonaluminized composite solid propellants. It is observed that catalyst-embeddedammonium perchlorate yields a higher burn rate as compared to the mechanically mixed catalyst.