Impurity Mn2+ defects in MgAl2O4 nanoceramics

Abstract

Nanoceramics of Mg1-xMnxAl2O4; x = 0.005, 0.00005 was obtained using thermobaric synthesis method. As a result of an increase in the concentration of impurity manganese, the impurity is redistributed over cationic positions, which stimulates lattice compression. The stabilization of the Mn2+ and Mn3+ states was discovered, due to the relatively low temperatures of thermobaric synthesis (not more than 600 °C). It is shown that impurity manganese ions in nanoceramics can act as indicators of structurally nonequivalent tetra- and octahedral positions.