Thermal decomposition of mechanoactivated ammonium perchlorate
| Autor: | A. Yu. Dolgoborodov, A. A. Shevchenko, G.A. Vorobieva, A. N. Streletskii, G. E. Val’yano |
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| Rok vydání: | 2018 |
| Předmět: |
Diffraction
Materials science Thermal decomposition Analytical chemistry Detonation 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Ammonium perchlorate 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Phase (matter) Particle size Physical and Theoretical Chemistry 0210 nano-technology Thermal analysis Instrumentation Ball mill |
| Zdroj: | Thermochimica Acta. 669:60-65 |
| ISSN: | 0040-6031 |
| Popis: | The regimes of non-explosive mechanical treatment of ammonium perchlorate (AP) in high-energy intensity planetary ball mill are found. The changes in the structure and reactivity of AP as a result of mechanical processing were studied by methods of synchronous thermal analysis with registration of mass spectra, x-ray diffraction, microscopy and elemental analysis. Mechanical treatment reduces the particle size from 1000 μm to a fraction of μm and leads to formation of agglomerates of submicron particles with sizes of 5–10 μm. X-ray diffraction analysis shows the absence of the formation of new phases and a substantial broadening of the diffraction lines. As a result of mechanical activation, the temperature of AP thermal decomposition decreases by more than 100 °C, accompanied by the rapid release of oxygen at temperatures of 250–260 °C, immediately after the phase transformation in AP. The results obtained make it possible to explain the phenomenon of a significant increase in the detonation ability of mechanically activated AP and its mixtures with Al. |
| Databáze: | OpenAIRE |
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