Synthesis Of High Purity ϒ-lithium Aluminate By Freeze Drying

A. C. Nascimento, M. E. Queiroz and N. D. S. Mohallem*

Laboratory of Nanostructured Materials, Federal University of Minas Gerais UFMG, Av. Antônio Carlos, 6627, CEP: 31270-901 Belo Horizonte, MG, Brazil

Adv. Mater. Lett., 2016, 7 (4), pp 267-270

DOI: 10.5185/amlett.2016.6126

Publication Date (Web): Mar 07, 2016

E-mail: nelcy@ufmg.br

Abstract


γ-LiAlO2 plate-like nanostructures have been synthesized by lyophilization of a gel precursor prepared by coprecipitation process. Aqueous solutions of Al(NO3)3.9H2O and LiNO3 were used as precursors, and NaOH was used as precipitant agent. After freeze-drying, the samples were calcined at several temperatures for characterization. The lyophilization process allowed the preparation of γ-LiAlO2 phase at 750 °C, which remained stable until temperatures about 1150 ºC, without the formation of other undesired phases as LiAl5O8

Keywords

&gamma,-LiAlO2, coprecipitation, freeze-drying, TEM.

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