Abstract
Manganese ferrites were quickly prepared from manganese oxide and iron oxide powders by a microwave discharge generated between two pieces of carbon felt (MD/CF) with various powers in air atmosphere, and were characterized especially by X-ray diffractometry and Mossbauer spectroscopy. MnFe2O4 was produced within at least 40 s by MD/CF with more than 200 W microwave power in air atmosphere. With the increase of the applied microwave power, FeO powders were produced in addition to distorted MnFe2O4 by using MnO and Fe2O3 powders as starting mixture. Improved yield for MnFe2O4 were obtained by post annealing for 1 hour or by using the raw mixed materials of MnO, MnO2 and Fe2O3.
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