ELECTRIC-CONDUCTIVITY STUDIES OF INTERACTION BETWEEN POTASSIUM PERCHLORATE AND ALUMINUM IN A RECOVERY AMPOULE

Results of experiments with continuous monitoring of electric conducti vity of potassium perchlorate-aluminum samples subjected to shock wave pressurization to 16 GPa in flat recovery ampoules are presented. The weight fraction of the metal component was 7%. The conductivity measu rements together with X-ray phase analysis of the recovered material s how that the reaction between the components takes place in narrow zon es adjacent to the ampoule wall and massive electrode, not spreading i nward the mixture bulk. From the conductivity changes we infer that th e chemical conversion process, including the stage of oxide film destr uction on aluminum particles at the shock wave front, can be identifie d with the following sequence of transitions: dielectric --> metal --> ion conductor --> dielectric. The resistance of the cell increases du e to aluminum depletion in the depressurized state.