Abstract
An unactivated mixture of aluminum hydroxide (gibbsite) and lithium carbonate and a mixture mechanically activated in an AGO-2 planetary mill were heat-treated in air and under vacuum (0.05 Pa) at temperatures of up to 800–850°C, and the phase composition of the heat treatment products was determined by in situ X-ray diffraction. The results demonstrate that, in the case of the unactivated mixture or after mechanical activation for 1 min, heat treatments in air and under vacuum lead to the formation of α-LiAlO2 and γ-LiAlO2, respectively. After mechanical activation for 5 or 10 min, heat treatment both in air and under vacuum leads to γ-LiAlO2 formation. A possible mechanism behind the effect of the reaction medium on the phase composition of LiAlO2 is analyzed.
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Original Russian Text © V.P. Isupov, N.V. Bulina, I.A. Borodulina, 2018, published in Neorganicheskie Materialy, 2018, Vol. 54, No. 2, pp. 160–168.
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Isupov, V.P., Bulina, N.V. & Borodulina, I.A. Effect of the Reaction Medium on the Mechanochemical Synthesis of LiAlO2. Inorg Mater 54, 147–155 (2018). https://doi.org/10.1134/S0020168518020073
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DOI: https://doi.org/10.1134/S0020168518020073