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Journal of Inorganic Materials

Journal of Inorganic Materials >

2009 , Vol. 24 >Issue 4: 721 - 726

DOI: https://doi.org/10.3724/SP.J.1077.2009.00721

Research Paper

Preparation and Characterization of M-type Strontium Ferrite Hollow Fibers

  • SONG Fu-Zhan ,
  • LIU Jin-Yong ,
  • MENG Xian-Feng ,
  • SHEN Xiang-Qian ,
  • XIANG Jun
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  • School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China

Received date: 2008-10-06

  Revised date: 2008-11-24

  Online published: 2009-07-20

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Abstract

The Mtype strontium ferrite （SrFe12O19） hollow fibers were prepared by the organic gel-precursor transformation method using citric acid and metal salts as raw materials. The gel-precursors and the as-prepared fibers were characterized by FTIR, XRD, TG/DSC, SEM and VSM. The results show that the gel spinnability is related with the chemical composition and pH value. The gel exhibits an appropriate spinning performance when the molar ratio of citric acid to the total metal ions is 1.5∶1.0 and the pH value is around 4.2. The M-type strontium ferrite hollow fibers obtained are characterized with high aspect ratio, thin diameters and ratio of the hollow diameter to the fiber diameter being about 1/2.The fibers calcined at 1100℃ are composed of SrFe12O19 nanoparticles with hexagonal plate morphology and average particle size of about several hundred nanometers. At room temperature, the saturation magnetization and coercivity of the M-type strontium ferrite hollow fibers calcined at 1100℃ are 53.5A·m2/kg and 386.96kA/m, respectively. These M-type strontium ferrite hollow fibers possess a shape anisotropy characteristic and the coercivity for the aligned hollow fibers parallel and parpendicular to the applied field is correspondingly 391.66kA/m and 358.72kA/m.

Key words： organic gel precursor transformation method; M-Sr ferrite; hollow fibers; spinnability; magnetic properties

Cite this article

SONG Fu-Zhan , LIU Jin-Yong , MENG Xian-Feng , SHEN Xiang-Qian , XIANG Jun . Preparation and Characterization of M-type Strontium Ferrite Hollow Fibers[J]. Journal of Inorganic Materials, 2009 , 24(4) : 721 -726 . DOI: 10.3724/SP.J.1077.2009.00721

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