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Surface reactions with participation of oxides of molybdenum and tungsten

A. F. Guseva, M. V. Trifonova

Abstract


The kinetics of surface reactions in one-dimensional and radial (two-dimensional) distribution of diffusant MoO3 (WO3) on the surface of the substrate MeO (Me is Cd, Ni, Pb, Mn, Cu) were investigated. A kinetic equation satisfactorily describes the rate of surface reactions in the case of radial distribution of diffusant on the substrate. It’s found that when the radial distribution of diffusant the growth of layer on the substrate surface eventually slows down and stops almost completely, due to the outflow of the diffusant deeps into the substrate. When the one-dimensional distribution of diffusant the surface interaction is not slowed down and does not stop at an arbitrarily large times.

Keywords


diffusant; molybdates; complex oxides; surface reaction diffusion; scanning electron microscopy

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References


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Neiman AYa, Guseva AF, Trifonova MV. Surface Reaction in the course of molybdates and tungstates formation. Solid State Ionics. 2001;141-2:321-9. doi:10.1016/S0167-2738(01)00798-6

Neiman AYa, Guseva AF, Trifonova MV, Sukhankina IV. Reactive Surface Diffusion during Synthesis of Molybdates and Tungstates: The Role of Phase Constitution of Product. Russ J Inorg Chem. 2005;50:319-24.

Chebotin VN, Perfil'ev MV. Electrokhimiya tverdykh elektrolitov [Electrochemistry of Solid Electrolytes]. Moscow: Khimiya; 1978. 312 p. Russian.




DOI: http://dx.doi.org/10.15826/chimtech.2015.2.4.033

Copyright (c) 2015 A. F. Guseva, M. V. Trifonova

© Chimica Techno Acta, 2014-2019
ISSN 2411-1414 (Online), ISSN 2409-5613 (Print)

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