Abstract
Abstract A nonthermal reduction of indium(III) oxide (In2O3) to metallic indium (In) was achieved through mechanochemical route in this work. A mixture of In2O3 and lithium nitride (Li3N) under ammonia (NH3) and/or nitrogen (N2) gas environments was milled in a planetary ball mill with uni-size ZrO2 balls to induce mechanochemical reaction between the starting materials. Metallic indium was obtained after milling for 120 min, and the results are confirmed by X-ray diffraction (XRD) analysis. Washing of the milled product with water to remove by-products using the planetary ball mill for a further 10 min resulted in formation of pellets which were analyzed by EPMA, results clearly show that high purity indium metal was obtained.
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