New method for synthesis of fine crystalline magnesium aluminate spinel

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Abstract

A new method for the synthesis of high-purity fine-crystalline aluminum-magnesium spinel MgAl2O4 was been proposed. The procedure includes treatment of mixture finely dispersed MgO and hydroxide Al(OH)3 or aluminum oxyhydroxide AlOOH by water fluid under supercritical conditions (T = 380-400 °С, PH2O =  22,8-23,0 MPa). It was been shown that the process of formation of the structure of aluminum-magnesium spinel proceeds through a solid-phase mechanism. By varying the conditions of synthesis, the new method of synthesis allows to adjust the size (from 20 nm to 5 µm) and shape (spherical, lamellar, bipyramidal) of particles of synthesized aluminum-magnesium spinel MgAl2O4.

About the authors

G. P. Panasyuk

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Author for correspondence.
Email: panasyuk@igis.ras.ru
Russian Federation, 31, Leninsky prospekt, Moscow, 119991

I. V. Kozerozhets

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Email: panasyuk@igis.ras.ru
Russian Federation, 31, Leninsky prospekt, Moscow, 119991

M. N. Danchevskaya

Lomonosov Moscow State University

Email: panasyuk@igis.ras.ru
Russian Federation, 1, Leninskie gory, Moscow, 119991

Yu. D. Ivakin

Lomonosov Moscow State University

Email: panasyuk@igis.ras.ru
Russian Federation, 1, Leninskie gory, Moscow, 119991

G. P. Muravieva

Lomonosov Moscow State University

Email: panasyuk@igis.ras.ru
Russian Federation, 1, Leninskie gory, Moscow, 119991

A. D. Izotov

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences

Email: panasyuk@igis.ras.ru

Corresponding Member of the Russian Academy of Sciences

Russian Federation, 31, Leninsky prospekt, Moscow, 119991

References

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