Ways of Reducing the Deflagration Tendency of ion‐exchanged permitted explosives

Abstract

AbstractThis work considers possible ways of reducing the deflagration tendency of ion‐exchanged permitted explosives based on new experimental data on the inhibition of ignition of methane‐air mixtures and on the cornbustion of condensed systems.The mixtures contained the nitrates or perchlorates of the alkali metals as oxidizers together with ammonium chloride, oxalate, sulphate or phosphate as fuel. They had a zero oxygen balance. The effect of adding 12% of gelatinized nitroglycol was also investigated. The lower pressure limit and the burning rate were chosen as parameters to characterize the deflagration rendency. They were in a constant pressure bomb over the pressure range 0.1 MPa to 100 MPa using a method described previously.It is shown that the lower pressure limit is higher and the burning rare lower for mixtures containing ammonium oxalate than for analogous mixtures but with ammonium chloride. The lower pressure limit is also higher for mixtures based on potassium perchlorate.The calculated explosive characteristics and the burning parameters of the mixtures investigated arc reported. Reasons for the higher deflagration tendency of the mixtures containing ammonium chloride are discussed.