One-step mechanosynthesis of nanocrystalline oxides
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چکیده
Fe-, Fe -, and Sn-based complex oxides, namely, Fe2GeO4, CaFe2O4 and Ca 2SnO4 nanopowders were prepared via single -step mechanosynthesis performed at room temperature. The mechanically induced formation of a nanooxide product phase was followed by XRD, Fe Mössbauer spectroscopy, and NMR. It is demonstrated that the mechanosynthesis of the complex oxide can proceed very rapidly (up to 4 h) . This is i n a strong c ontrast to the conventio nal solid-state synthes is of the com plex oxides, which req uires prol onged e xposure a t considerably elevated temperatures. It was revealed that the main structural features of the mechanosynthesized oxides are nonequilibrium cation distribution and distorted oxygen polyhedra.
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تاریخ انتشار 2015