Open AccessNew method for synthesis of fine crystalline magnesium aluminate spinel
Author(s) -
G. P. Panasyuk,
И. В. Козерожец,
M. N. Danchevskaya,
Yu. D. Ivakin,
G. P. Muravieva,
А. Д. Изотов
Publication year - 2019
Publication title -
doklady akademii nauk. rossijskaâ akademiâ nauk
Language(s) - English
Resource type - Journals
ISSN - 0869-5652
DOI - 10.31857/s0869-56524874387-390
Subject(s) - spinel , magnesium , lamellar structure , aluminium , materials science , chemical engineering , hydroxide , phase (matter) , aluminium hydroxide , inorganic chemistry , supercritical fluid , mineralogy , metallurgy , chemistry , organic chemistry , engineering
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.