Thermal Evolution and Structural Study of Cobalt Doped Magnesium Aluminate Spinel Nanoparticles Prepared by Coprecipitation Technique
Keywords:
Magnesium Aluminate, Cobalt, Nanoparticle, Coprecipitation, Structure Characterization.Abstract
Introduction of transition metal ( M = Co, Fe, Ni, V, Cr, Mn, Ca, Ba, Sr ) in MgAl2O4 spinel have attracted a lot of interest of researchers as well as technologists due to its excellent absorption, emission and luminescence properties potential use. Among various transition metals, Co: MgAl2O4 can be regarded as a good candidate for such applications to the high mechanical resistance, high thermal and chemical stability, and low temperature sinterability of spinel type oxide materials. The physical properties of Co:MgAl2O4 like chemical strength, catalytic ability, and high temperature resistivity have been further enhanced. Cobalt-magnesium aluminate crystallizes at relatively higher temperature, i.e. above 850°C as compared to un-doped magnesium aluminate that crystallizes around 800°C. A single phase Co:MgAl2O4 face centred cubic ordered-spinel nanopowder (grain size ~ 20 nm) with a good, chemical homogeneity, is obtained by using co-precipitation method followed by thermal treatment at temperature 1000°C for 4h, in air.
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