Abstract
X-ray diffraction and thermal analyses, microscopy, and specific surface area measurements are used to study the formation, structure, and reactivity of mechanoactivated Mg/MoO3 and Al/MoO3 nanocomposites during slow heating (10°C/min). The optimal mechanoactivation dose is determined. The mechanoactivated Mg/MoO3 composite is a dense mixture of two nanosized components with a contact surface of ~8 m2/g (upper estimate). The area of the contact surface between the components of the Al/MoO3 composite is less than 2 m2/g, with the sample consisting of micron-sized aluminum flakes coated with nanoparticles oxide nanoparticles. When heated, the Mg/MoO3 system explodes, with the temperature of explosion being determined by the heating conditions. The minimum temperature of conversion is ~250°C, close to the temperature of autoignition of fuel–air mixtures promoted by these additives. The Al/MoO3 system is characterized by a phased progress of the reaction in the temperature range of 200 to 1000°C. The reasons for the differences in the reactivity of the mixtures are discussed.
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Original Russian Text © A.N. Streletskii, I.V. Kolbanev, K.Ya. Troshin, A.A. Borisov, A.V. Leonov, S.N. Mudretsova, V.V. Artemov, A.Yu. Dolgoborodov, 2016, published in Khimicheskaya Fizika, 2016, Vol. 35, No. 7, pp. 79–91.
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Streletskii, A.N., Kolbanev, I.V., Troshin, K.Y. et al. Structure and reactivity of mechanoactivated Mg (Al)/MoO3 nanocomposites. Russ. J. Phys. Chem. B 10, 707–718 (2016). https://doi.org/10.1134/S1990793116040114
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DOI: https://doi.org/10.1134/S1990793116040114