Solid-State Synthesis of Lithium-Substituted Spinels Mg1 – xLixMnO3 – δ

Abstract

Solid solutions based on MgMnO_3 – δ in which magnesium is partially substituted for by lithium were produced by solid-phase synthesis by air annealing of mechanocomposites obtained by mechanical activation (in a vibration ball mill) of mixtures of high-purity grade precursors: oxides MgO, Mn₂O₃, and MnO₂, and also Li₂CO₃ and LiOH · H₂O. It was shown that using lithium hydroxide monohydrate increases the degree of substitution of lithium for magnesium with simultaneous decrease in the synthesis temperature in comparison with using lithium carbonate.