Phase Composition of Ni1–2хMnхCoхOy Precursors, where x = 0–0.5, Obtained by Solution Combustion Synthesis

Abstract

Precursors of composition Ni_1–2хMn_хCo_хO_y, where x = 0–0.5, have been prepared by solution combustion synthesis. The phase composition of precursors have been confirmed by X-ray powder diffraction. Samples morphology has been studied by scanning electron microscopy in combination with energy-dispersive analysis. Change in the phase composition of precursors of mixed d-metal oxides depending on synthesis conditions and annealing temperatures has been studied. NiO, Ni, and MnCo₂O₄ content in Ni_1–2хMn_хCo_хO_y precursors composition after solution combustion synthesis (SCS) and after 550°C have been studied. Dependence of parameter a of crystal lattice of spinel phase on the composition of sample after annealing at 550, 800, and 900°C has been determined. Precursor Ni_1–2хMn_хCo_хO_y (x = 0.1–0.333) is monophase after annealing at 550°C.