Combustion synthesis of magnesium indate, MgIn2O4

MgIn2O4, a mixed oxide with spinel structure was prepared by combustion synthesis using metal nitrates and urea as fuel. Structural, optical and electrical characterization of the same was carried out. From the diffuse reflectance spectral measurement of MgIn2O4, the band gap was found to be 4.3 eV which is higher than that of indium tin oxide (ITO). The conductivity of as prepared sample and that of the H2-annealed sample of MgIn2O4 was 1.56×10−3 and 5.57×100 S cm−1. The particle size of the above combustion derived sample was found to be 2–3 μm.