Crystal Structure of Acicular Barium Ferrite Fine Particles.

• Kakizaki Koichi

  Dept. of Functional Materials Science, Faculty of Engineering, Saitama Univ.

• Hiratsuka Nobuyuki

  Dept. of Functional Materials Science, Faculty of Engineering, Saitama Univ.

Bibliographic Information

Other Title

• 記録磁性材料　針状バリウムフェライト微粒子の結晶構造
• シンジョウ バリウム フェライト ビリュウシ ノ ケッショウ コウゾウ

Abstract

Acicular barium ferrite fine particles doped with Co₂₊ ions and Ti₄₊ ions were prepared by a conventional sintering method. We investigated fine structure of the acicular BaCo_xTi_xFe_12-2xO₁₉ (X=0 and 0.7) particles using x-ray diffractometer (XRD) and high resolution transmission electron microscope (HR-TEM). From x-ray diffraction patterns of them, the acicular BaCo_xTi_xFe_12-2xO₁₉ particles had a hexagonal structure of the magnetoplumbite type. These acicular BaCo_xTi_xFe_12-2xO₁₉ particles had the long axis of about 1.0μm, the short axis of 0.09μm and the aspect ratio of about 11. It was observed by dark field images of TEM that one acicular BaCo_xTi_xFe_12-2xO₁₉ particle consisted of some crystallites and the c-axis of them were lying perpendicular to the long axis of the acicular particle. Moreover, the a-axis of them was slightly deviated from the long axis. This crystal structure was not changed by doping of Co²⁺ and Ti⁴⁺ ions.

Journal

• Journal of the Japan Society of Powder and Powder Metallurgy

  Journal of the Japan Society of Powder and Powder Metallurgy 44 (7), 663-667, 1997

  Japan Society of Powder and Powder Metallurgy

Keywords

• acicular particle
• hexagonal barium ferrite
• crystal structure
• HR-TEM observation

Details

• CRID: 1390001206307861120
• NII Article ID: 10002014222
• NII Book ID: AN00222724
• DOI: 10.2497/jjspm.44.663
• ISSN: 18809014
• ISSN: 05328799
• NDL BIB ID: 4258099
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4258099
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed