Abstract
Hydrothermal treatment method was proposed to prepare pure LiAlO2 with fibrous crystal morphology and the effect of precursors on the morphology of lithium aluminate was investigated. Lithium butoxide-aluminum butoxide system gave mostly rod-like β-LiAlO2 crystal. As the length of alkoxy group decreases, the fraction of plate shape crystals was increased and boehmite was dominant crystal phase. Needle-shape β-LiAlO2 was produced from lithium nitrate-aluminum butoxide-sodium hydroxide system with the mole ratio of 6:1:3, respectively. β-LiAlO2 prepared by hydrothermal treatment was transformed to γ-LiAlO2 at 750–850°C. The specific surface area of γ-LiAlO2 powders was above 10 m2/g.
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