Investigation of Propellant and Explosive Solid Solution Systems: I. Crystal Synthesis.
ARMY ARMAMENT RESEARCH AND DEVELOPMENT COMMAND DOVER NJ LARGE CALIBER WEAPON SYSTEMS LAB
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A new approach was discussed and tried for making unique new oxidizer type materials for use in solid propellants. This involved theoretical identification of promising systems of isomorphous oxidizer, solid-solution mixed crystals. To make these materials for evaluation purposes required the selection of the most rigorous method possible so that the product would have a maximum opportunity of being homogeneous. This synthesis technique was isothermal cocrystallatization, a procedure normally utilized in phase rule chemistry in studying the behavior of a salt pair in a solvent such as water at constant temperature. Three types of isomorphous solid solutions were the object of principal concern, namely the AP-KP, AP-AN, and AN-KN pairs. Published phase rule data on the ternary systems of the above three respective salt pairs in water were used as a basis for making solid solutions of selected compositions. New techniques were devised and tested successfully for making larger quantities than would normally be possible by the strict phase rule approach. In some cases, particularly with the AP-AN solid solutions, the desired degree of product homogeneity was difficult to attain. Effectiveness of the grinding operation of the product, as it was being formed, proved to be of critical importance in the attainment of product homogeneity. Solid solutions of the above-mentioned types were successfully prepared for characterization studies. Author
- Ammunition and Explosives