Study on charcoal-free black powder

Through modifying proportions of potassium nitrate, sulfur, phenolophthalein and potassium hydrate, formula of charcoal-free black powder is optimized by replacing charcoal with reactant of phenolphthalein and potassium hydrate. Properties between ordinary black powder and charcoal-free powder are compared, including mechanical sensitivity, static electricity sensitivity, thermal decomposition process and output capacity. The results indicate that the mechanical sensitivity, static electricity sensibility and ignition temperature of charcoal-free black powder is lower than that of ordinary black powder, and the safety ability, working capacity and output stability of charcoal-free black powder is higher than that of ordinary black powder.