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Structure and reactivity of mechanoactivated Mg (Al)/MoO3 nanocomposites

  • Chemical Physics of Nanomaterials
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Russian Journal of Physical Chemistry B Aims and scope Submit manuscript

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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Authors and Affiliations

  1. Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia

    A. N. Streletskii, I. V. Kolbanev, K. Ya. Troshin, A. A. Borisov, S. N. Mudretsova & A. Yu. Dolgoborodov

  2. Moscow State University, Moscow, Russia

    A. V. Leonov & S. N. Mudretsova

  3. Institute of Crystallography, Russian Academy of Sciences, Moscow, Russia

    V. V. Artemov

Authors
  1. A. N. Streletskii
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  2. I. V. Kolbanev
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  3. K. Ya. Troshin
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  4. A. A. Borisov
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  5. A. V. Leonov
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  6. S. N. Mudretsova
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  7. V. V. Artemov
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  8. A. Yu. Dolgoborodov
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Corresponding author

Correspondence to A. N. Streletskii.

Additional information

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

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