Effect of milling in various media and annealing on the structure and magnetic properties of strontium hexaferrite powder

S. V. Ketov, E. A. Lopatina, T. A. Bulatov, Yu D. Yagodkin, V. P. Menushenkov

    研究成果: Conference contribution

    3 被引用数 (Scopus)

    抄録

    In the present work, the structure and magnetic properties of strontium hexaferrite powder during milling in various media and subsequent annealing were studied. The milling of the powder leads to an abrupt decrease in the powder particle size and the average crystallite sizes as well as an increase in lattice microstrains of the SrFe12O19 phase. During milling in toluene, no changes in the phase composition were observed, whereas, during milling in water, the Fe2O3 phase (type H1.1) is formed. In the powder milled in oleic-acid-containing toluene a small quantity of α-Fe was found. After milling, the saturation magnetization and remanence decrease; at the same time, the coercive force of the powder milled in toluene is unchanged with increasing milling time, but slightly increases after milling in water and in oleic-acid-containing toluene. The annealing allowed us to increase the magnetic properties of the powder. It is conditioned by formation of nanocrystalline state. Moreover, the magnetic properties values depend on the medium and time of milling. The annealed powders are characterized by the following magnetic properties: μ0Hci = 0.42 ÷ 0.49 T, Br = 0.23 ÷ 0.24 T, (BH)max= 8-9.6 kJ/m3.

    本文言語English
    ホスト出版物のタイトルMagnetism and Magnetic Materials V
    出版社Trans Tech Publications Ltd
    ページ183-187
    ページ数5
    ISBN(印刷版)9783037854365
    DOI
    出版ステータスPublished - 2012
    イベント5th Moscow International Symposium on Magnetism, MISM 2011 - Moscow, Russian Federation
    継続期間: 2011 8 212011 8 25

    出版物シリーズ

    名前Solid State Phenomena
    190
    ISSN(印刷版)1012-0394

    Other

    Other5th Moscow International Symposium on Magnetism, MISM 2011
    国/地域Russian Federation
    CityMoscow
    Period11/8/2111/8/25

    ASJC Scopus subject areas

    • 原子分子物理学および光学
    • 材料科学(全般)
    • 凝縮系物理学

    フィンガープリント

    「Effect of milling in various media and annealing on the structure and magnetic properties of strontium hexaferrite powder」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

    引用スタイル