Dehydration-Reduction Coupling Effects in the Transformation of Goethite to Magnetite
The quality of γ-.Fe2O3 (maghemite) used in magnetic tapes strongly depends on the various stages of preparation. The present communication concerns the first stages, namely dehydration and reduction of goethite (γ-FeOOH) to magnetite (Fe3O4). We have focused our study on the effect of water pressure on these two stages and on the coupling effect between dehydration and reduction. Particular attention was paid to consequences of this coupling effect on the texture of the products.
KeywordsCoupling Effect Ferric Sulfate Metallic Iron Water Vapor Pressure Magnetic Tape
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