Effect of the Reaction Medium on the Mechanochemical Synthesis of LiAlO2


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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.

作者简介

V. Isupov

Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch

编辑信件的主要联系方式.
Email: isupov@solid.nsc.ru
俄罗斯联邦, ul. Kutateladze 18, Novosibirsk, 630128

N. Bulina

Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch

Email: isupov@solid.nsc.ru
俄罗斯联邦, ul. Kutateladze 18, Novosibirsk, 630128

I. Borodulina

Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch

Email: isupov@solid.nsc.ru
俄罗斯联邦, ul. Kutateladze 18, Novosibirsk, 630128

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