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- W1986358210 abstract "The effects of wet-milling α-Fe2O3 in vacuum for up to 144 h have been investigated by neutron diffraction measurements at room temperature and in situ at ∼950 K. Rietveld refinements show that the main product is iron-deficient magnetite of approximate stoichiometry ∼Fe2.8O4. Comparison of the phases derived from the neutron data with results of the Fe2+/Fe3+ oxidation states as determined by chemical analysis reveals that a significant fraction of the unreacted α-Fe2O3 occurs in an amorphous-like or disordered state. The wet-milled products are also found to contain ∼8% γ-Fe2O3. The transformation from the α-phase to the γ-phase occurs as a result of the shearing during the low-energy milling, with the further collisions and impacts leading to defect magnetite on extended milling. While other contributing effects take place, the transformation process from α-Fe2O3 to Fe3−xO4 occurs mainly as a result of rupturing the oxide surface layers of α-Fe2O3 and releasing oxygen with consequent reduction to Fe3−xO4." @default.
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- W1986358210 date "2003-01-01" @default.
- W1986358210 modified "2023-10-16" @default.
- W1986358210 title "Mechanochemical transformation of α-Fe2O3 to Fe3−xO4–microstructural investigation" @default.
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- W1986358210 doi "https://doi.org/10.1016/s0925-8388(02)00808-3" @default.
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