Ultrafine BaFe12O19 powder synthesised by mechanochemical processing

J. Ding, T. Tsuzuki, Paul Mccormick

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    Ultrafine BaFe12O19 powder has been synthesised by a novel mechanochemical preparation method. Mechanical milling of 1.2BaCl(2) + 12FeCl(3) + 38.4NaOH led to a mixture of NaCl and iron and barium hydroxide or oxide-hydroxide. The formation of BaFe12O19 required annealing at 800 degrees C in air. A significant reduction of particle size was achieved by dilution with NaCl. High coercivity values above 5 kOe were measured for BaFe12O19 platelets of 20-100 nm in diameter and 10-20 nm thick. (C) 1998 Elsevier Science B.V. All rights reserved.
    Original languageEnglish
    Pages (from-to)931-932
    JournalJournal of Magnetism and Magnetic Materials
    Publication statusPublished - 1998

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