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化学学报
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化学学报 ›› 2008, Vol. 66 ›› Issue (13): 1559-1564. 上一篇    下一篇

研究论文

镧掺杂锶铁氧体-聚吡咯复合物的制备及磁性研究

潘玲玲a,b 王育萍a 李良超*,a 刘 徽a 徐 烽a   

  1. (a浙江师范大学物理化学研究所 浙江师范大学化学系 金华 321004)
    (b武汉大学化学与分子科学学院 武汉 430072)
  • 投稿日期:2007-09-02 修回日期:2008-02-27 发布日期:2008-07-14
  • 通讯作者: 李良超

Preparation and Magnetic Properties of La-doped Sr Ferrite/Polypyrrole Composites

PAN, Ling-Ling a,b WANG, Yu-Ping a LI, Liang-Chao *,a LIU, Hui a XU, Feng a   

  1. (a Institute of Physical Chemistry, Department of Chemistry, Zhejiang Normal University, Jinhua 321004)
    (b College of Chemistry and Molecular Science, Wuhan University, Wuhan 430072)
  • Received:2007-09-02 Revised:2008-02-27 Published:2008-07-14
  • Contact: LI, Liang-Chao

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被引次数

54 | 8

用溶胶-凝胶法和溶液原位合成法分别制备镧掺杂锶铁氧体(Sr1－xLaxFe11.5Ni0.5O19, x＝0.0, 0.1, 0.2, 0.3, 0.4)粉末及其吡咯相对质量分数为60%和80%的聚吡咯-铁氧体复合物微粒PPY (Polypyrrole)/Sr0.8La0.2Fe11.5Ni0.5O19. 借助X射线衍射(XRD)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)、红外光谱(FTIR)和振动样品磁强计(VSM)等分析手段表征了铁氧体粉末和复合物微粒的结构、形貌和磁性能. 结果表明, 包覆的聚吡咯外层对复合物微粒的形貌和磁性有一定的影响. 在外加磁场作用下, 复合物的饱和磁化强度MS随吡咯含量的增加而减小, 当吡咯含量等于0%, 60%和80%时, 对应的MS分别为59.4, 18.7和10.3 emu/g.

关键词: 锶铁氧体, 稀土, 掺杂, 聚吡咯, 复合材料

La-doped Sr ferrite powders (Sr1－xLaxFe11.5Ni0.5O19, x＝0.0, 0.1, 0.2, 0.3, 0.4) and their polypyrrole composites PPY/Sr0.8La0.2Fe11.5Ni0.5O19 with 60% and 80% pyrrole were prepared by a sol-gel method and an in situ polymerization method, respectively. The structure, morphologies and magnetic properties of the samples were characterized by means of powder X-ray diffractometer (XRD), Fourier transform infrared (FTIR) spectrometer, transmission electron microscope (TEM), scanning electron microscope (SEM) and vibrating sample magnetometer (VSM). The results indicate that the cover layer of PPY has an affection on the magnetic property and morphology of the composites. The magnetization of the composites decreased with increasing of pyrrole contents under the applied magnetic field. When pyrrole contents equal to 0%, 60% and 80%, corresponding MS are 59.4, 18.7 and 10.3 emu/g, respectively.

Key words: Sr-ferrite, rare earth, doped, PPY, composite