Mechanochemical Synthesis of Iron-Containing Lithium-Manganese Spinels
Yu. G. MATEYSHINA1,2, N. F. UVAROV2 and Yu. T. PAVLYUKHIN2
1,2Novosibirsk State University, Ul. Pirogova 2, Novosibirsk 630090 (Russia)
2Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences,
Ul. Kutateladze 18, Novosibirsk 630128 (Russia) E-mail: YuliaM@solid.nsc.ru
Pages: 291-294
Abstract
Solid solutions of the LiFe1-yTi1-xMnx+yO4 (0 ≤ x ≤ 1; 0 ≤ y ≤ 1) composition are investigated; their physicochemical properties are studied with the help of X-ray diffraction and electrical measurements. It is shown that the substitution of manganese cations for titanium and iron in the spinel structure results in a linear decrease in the lattice parameter. Electrical conduction increases monotonously with an increase in manganese concentration. Conductivity is electronic; activation energy decreases monotonously with an increase in (x + y) from 0.50 to 0.33 eV. Quenched samples possess higher conductivity and larger lattice parameter, which may be due to non-stoichiometry in the oxygen sublattice.
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