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Hydrothermal processings to produce magnetic particulates

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5 Author(s)
C. H. Lin ; Dept. of Mater. Sci. & Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan ; Z. W. Shih ; T. S. Chin ; M. L. Wang
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α-Fe2O3, γ-Fe2O3 , and α-FeOOH powders were used as starting materials to prepare barium hexaferrite hydrothermally. Since strontium hexaferrite and lanthanum-doped calcium hexaferrite have coercivities similar to that of barium ferrite, the hydrothermal synthesis of strontium hexaferrite and lanthanum-doped calcium hexaferrite were also explored. The reaction products obtained with the various starting materials are described. Electron micrographs showed that α-Fe2O3, γ-Fe2O3, or α-FeOOH dissolved in the solution first, and then barium hexaferrite nucleated and grew from the solution

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IEEE Transactions on Magnetics  (Volume:26 ,  Issue: 1 )