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Acta Chimica Sinica ›› 2008, Vol. 66 ›› Issue (13): 1559-1564. Previous Articles     Next Articles

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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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