Effect of Molybdenum on electric propierties of LaMnO3
Abstract
In this work, the effect of molybdenum (Mo) doping in lanthanum manganite, LaMnO3, was studied with the purpose of proposing possible applications according to its electrical properties, in a range of compositions from 0.0 to 0.20 mol of Mo+6 with ∆x=0.05. The manganites were obtained from high purity metal oxides by high energy milling assisted with heat treatment at 1100 °C. The results obtained by XRD show the transformation of the rhombohedral to cubic phase of LaMnO3 upon doping with 0.05 mol of Mo. Additionally, the formation of La2Mo2O9 as a secondary phase was identified. On the other hand, the effect of doping on the electrical conductivity was evaluated, which decreases with increasing dopant concentration. Likewise, by increasing the temperature in a range from 25 °C to 500 °C, independent of the doping level, the electrical conductivity increases, making these materials candidates for thermistors and solid oxide cell cathodes.
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