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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

六角钡铁氧体准单晶块材制备及其磁性能研究

刘俊亮， 郭翠静， 张 伟， 曾燕伟   

  1. 南京工业大学 材料科学与工程学院， 南京 210009
  • 收稿日期:2008-09-18 修回日期:2008-11-24 出版日期:2009-05-20 网络出版日期:2009-05-20

Fabrication of Ba-Hexaferrite Quasi-single Crystals and their Magnetic Properties

LIU Jun-Liang, GUO Cui-Jing, ZHANG Wei, ZENG Yan-Wei   

  1. School of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009,China
  • Received:2008-09-18 Revised:2008-11-24 Published:2009-05-20 Online:2009-05-20

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1977

被引次数

9 | 1

摘要： 具有高磁晶各向异性场的六角钡铁氧体（BaFe12O19, BaM）是毫米波器件中关键的旋磁材料.以片状纳米尺度六角钡铁氧体单畴颗粒为原料粉体，通过强磁场颗粒取向、加压成型、等静压处理以及微液相参与烧结等过程，成功制备得到了晶粒沿c轴取向度达99％的六角钡铁氧体准单晶材料，其磁性接近单晶铁酸钡，饱和磁化强度达到4654kA/m，矫顽场约为9.552kA/m，并对其织构化和致密化机理进行了分析与讨论.

关键词: 六角钡铁氧体, 旋磁铁氧体, 准单晶结构, 液相参与烧结

Abstract: Barium hexaferrite (BaFe12O19, BaM) with large uniaxial magnetocrystalline anisotropy is a key gyromagnetic material for the millimeter wave device. BaM quasi-single crystal materials with a grain orientation degree(GOD) of 99% were successfully fabricated by using nanosized single-domain BaM crystallites as the starting materials via press-forming in magnetic filed and sintering with minor liquid participation. The as-fabricated BaM quasi-single crystals were characterized with the saturation magnetization of 4654kA/m, the coercity field of 9.552kA/m and their formation mechanism was also discussed.

Key words: Ba-hexaferrite, gyromagnetic ferrites, quasi-single crystal structure, liquid participation sintering

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