在c轴方向上拉长的针状六方铁素体颗粒的制备尝试

Kanpei NISHIOKA, Yu YAMAMOTO, Masakuni TAKAHASHI, Jun KANO, Tatsuo FUJII
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引用次数: 0

摘要

采用c轴方向生长的针状α-Fe2O3颗粒合成了钡铁氧体颗粒。采用通量法合成,针状α-Fe2O3颗粒在NaCO3通量中与BaCO3反应。得到了沿c轴方向生长的针状BaFe12O19颗粒。针状结构由沿c轴堆积的片状颗粒组成。在相同的合成条件下,由球形α-Fe2O3制备的血小板状BaFe12O19颗粒的矫顽力比本研究合成的针状BaFe12O19颗粒小。因此,可以推断形状各向异性对针状颗粒的磁性能有影响。
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Attempt for Fabrication of Acicular Hexagonal Ferrite Particles Elongated in the c-axis Direction
Barium ferrite particles were synthesized from acicular α-Fe2O3 particles grown in the c-axis direction. The synthesis was carried out by the flux method, in which acicular α-Fe2O3 particles reacted with BaCO3 in NaCO3 flux. The acicular-shaped BaFe12O19 particles grown in the c-axis direction were obtained. The acicular shape consisted of aggregates of plate-like particles stacked along the c-axis. The platelet-shaped BaFe12O19 particles prepared from spherical α-Fe2O3 under the same synthesis conditions exhibited a smaller coercivity than the acicular BaFe12O19 particles synthesized in this study. Therefore, it can be inferred that the shape anisotropy has an effect on the magnetic properties of the acicular particles.
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