高等学校化学学报

高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (9): 1467.

• 论文 • 上一篇    下一篇

X型六角晶系钡铁氧体纳米晶的制备和表征

熊纲, 杨绪杰, 王晓慧, 陆路德, 汪信   

  1. 南京理工大学材料化学教研室, 南京, 210094
  • 收稿日期:1997-07-16 出版日期:1998-09-24 发布日期:1998-09-24
  • 通讯作者: 汪信
  • 作者简介:熊纲,男,25岁,博士研究生.
  • 基金资助:

    国家教育委员会博士学科点基金(批准号:BJ9502)资助课题.

Synthesis and Characterization of X-type Barium Ferrite Nanocrystals

XIONG Gang, YANG Xu-Jie, WANG Xiao-Hui, LU Lu-De, WANG Xin   

  1. Materials Chemistry Laboratory, Nanjing University of Science and Technology, Nanjing, 210094
  • Received:1997-07-16 Online:1998-09-24 Published:1998-09-24

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被引次数

49

摘要： 用硬脂酸凝胶法制备了Co2-X型六角晶系钡铁氧体纳米晶,在750℃热处理得到的纳米晶形貌为球形,粒径范围为15～25nm.随着热处理温度的升高,粒子逐渐长大并呈块状.振荡样品磁强计测试结果表明,Co2-X型六角晶系钡铁氧体纳米晶具有与常规体材料不同的磁性能,其比饱和磁化强度σs低于后者.产物的矫顽力、比饱和磁化强度随粒子的长大呈规律性的变化.

关键词: 纳米晶体, X型钡铁氧体, 磁性质

Abstract: Nanostructured samples of X-type Ba2Co2Fe28O46 hexagonal ferrite have been prepared by using the stearic acid gel method. The nanocrystalline hexaferrite powders obtained at 750 ℃ were spherical in shape with grain sizes in the range of 15～25 nm. With increasing calcining temperature, the particles become a plate-like structure. The magnetic properties of Xtype barium ferrite nanocrystals were measured by using Vibrating Sample Magnetometer(VSM). The results indicate that the magnetic properties of the title products are different from those of the common X-type hexaferrites with a lower specific saturation magnetization( σs). Coercivity force( Hc) and the specific saturation magnetization( σs) of the products are influenced by the particles sizes.

Key words: Nanocrystal, X-type barium ferrite, Magnetic property

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