Hydrothermal synthesis of magnetite particles with uncommon crystal facets

Junki Sato, Makoto Kobayashi, Hideki Kato, Takamichi Miyazaki, Masato Kakihana

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    29 Citations (Scopus)

    Abstract

    Hydrothermal synthesis of Fe 3 O 4 (magnetite) particles was carried out using organic compounds as morphology control agents to obtain magnetite crystals with uncommon facets. It was established that the morphology of Fe 3 O 4 crystals obtained by hydrothermal treatment of an aqueous solution containing Fe 2+ and organic compounds depended on the organic compound used. The shape of the Fe 3 O 4 particles obtained when no additives were used was quasi-octahedral. In contrast, the addition of picolinic acid, citric acid or pyridine resulted in the formation of polyhedral crystals, indicating the presence of not only {111}, {100} and {110} facets but also high-index facets including at least {311} and {331}. When citric acid was used as an additive, octahedral crystals with {111} facets also appeared, and their size decreased as the amount of citric acid was increased. Thus, control of Fe 3 O 4 particle morphology was achieved by a simple hydrothermal treatment using additives.

    Original languageEnglish
    Pages (from-to)258-262
    Number of pages5
    JournalJournal of Asian Ceramic Societies
    Volume2
    Issue number3
    DOIs
    Publication statusPublished - 2014 Sep

    Keywords

    • High-index facets
    • Hydrothermal method
    • Magnetite
    • Morphology control

    ASJC Scopus subject areas

    • Ceramics and Composites

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