Journal of Inorganic Materials ›› 2011, Vol. 26 ›› Issue (8): 797-801.DOI: 10.3724/SP.J.1077.2011.00797

• Research Paper • Previous Articles     Next Articles

Preparation and Magnetic Properties of Sr1-xLaxFe12-xCoxO19 Nanofibers by Electrospinning

LI Cong-Ju1,2, ZHANG Lian-Lian1,2, WANG Jiao-Na1,2   

  1. (1.Department of Material Science and Engineering, Beijing Institute of Clothing Technology, Beijing 100029, China; 2.Beijing Key Laboratory of Clothing Materials R&D and Assessment, Beijing 100029, China)
  • Received:2010-10-08 Revised:2010-12-06 Published:2011-08-20 Online:2011-07-14
  • Supported by:

    National Natural Science Foundation of China (51073005); Natural Science Foundation of Beijing (2112013); Technology Development Plan of Beijing Education Commission (KZ201010012012) PHR (IHLB); 863 Project (2007AA021906); 973 Project (2010CB933501)

Abstract: PVP/Sr1-xLaxFe12-xCoxO19 (x=0-0.5) composite nanofiers were fabricated by Sol-Gel process and electrospinning technique. After high temperature calcination, Sr1-xLaxFe12-xCoxO19 (x=0-0.5) ferrite nanofibers were successfully obtained. The morphology, phases, structure and magnetic properties of the nanofibers were characterized by Scanning electron microscope(SEM), Transmission electron microscope(TEM), X-ray diffraction(XRD) and Vibrating sample magnetometer(VSM). The results show that the samples have an uniform diameter of 80-150 nm after calcined at 800℃. The Sr1-xLaxFe12-xCoxO19 (x=0-0.5) ferrite nanofiers all exhibit a hard magnetic performance, and chemical composition have considerable influence on magnetic properties of these ferrite nanofibers. The Sr1-xLaxFe12-xCoxO19 (x=0-0.5) ferrite nanofiers exhibit M-type strontium ferrites, CoFe2O4 phase and LaFeO3 phase at x≥0.3. The substitutions of La3+ and Co2+ obviously increase the magnetic properties of the as-prepared samples at x≤0.1, the coercivity(Hc), saturation magnetization(Ms) and remanent magnetization(Mr) of Sr0.9La0.1Fe11.9Co0.1O19 nanofibers are 432.02 kA/m, 54.7 A·m2/kg, 28.9 A·m2/kg, respectively. The magnetic properties of the fibers increase significantly, compared with that of the Sr0.9La0.1Fe11.9Co0.1O19 powder samples.

Key words: electrospinning, M-type strontium ferrites, La-Co substitution, magnetic properties

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