采用溶胶-凝胶过程和静电纺丝技术相结合的方法,制得了PVP/Sr1-xLaxFe12-xCoxO19(x=0～0.5)复合纳米纤维,经过煅烧处理过程,获得了Sr1-xLaxFe12-xCoxO19(x=0～0.5)纳米纤维.通过SEM、TEM、XRD和VSM等技术对样品的形貌、物相、结构以及磁性能进行了表征.结果表明,800℃煅烧后的Sr1-xLaxFe12-xCoxO19 (x=0.5)纳米纤维的直径主要分布在80～150 nm;这些纤维在室温下都具有硬磁特性,化学组成对铁氧体的磁性能有着显著的影响,当x≥0.3时,样品中同时出现M型的SrFe12O19、LaFeO3和CoFe2O4;在适当范围内(x≤0.1),La3+-Co2+的掺杂有利于改善锶铁氧体纤维的永磁性能,相应的矫顽力、饱和磁化强度和剩余磁化强度分别为H=432.02kA/m,Ms=54.7A·m2/kg,Mr=28.9A·m2/kg,与传统溶胶-凝胶法在相同条件下制得的Sr0.9La0.1Fe11.9Co0.1O19粉体样品相比,磁性能也有显著提高.
参考文献
| [1] | Li C J,Wang J N.Electrospun SrRe0.6Fe11.4O19 magnetic nanofibers:fabrication and characterization.Materials Letters,2010,64(5):586-588. |
| [2] | Tenaud P,Morel A,Kools F,et al.Recent improvement of hard ferrite permanent magnets based on La-Co substitution.Journal of Alloys and Compounds,2004,370(1/2):331-334. |
| [3] | Janasi S R,Emura M,Landgraf F J G,et al.The effects of synthesis variables on the magnetic properties of coprecipitated barium ferrite powders.Journal of Magnetism and Magnetic Materials,2002,238(1):168-172. |
| [4] | 李锐,洪炜宁,孙学峰.Sr1-xLaxFe12-xCoO19铁氧体纳米颗粒的结构与磁性.磁性材料及器件,2009,40(3):32-34,45. |
| [5] | Kishan Reddy N,Mulay V N.Magnetic properties of W-type ferrites.Materials Chemistry and Physics,2002,76(1):75-76. |
| [6] | Liu X S,Hernandez-Gomez P,Huang K,et al.Research on La3+-Co2+-substituted strontium ferrite magnets for high intrinsic coercive force.Journal of Magnetism and Magnetic Materials,2006,305(2):524-528. |
| [7] | Wiesinger G,Muller M,Grossinger R.et al.Substituted ferrites studied by nuclear methods.Physica Status Solidi A,2002,189(2):499-508. |
| [8] | 黄凯,刘先松.Sr1-xLaxFe12-xCoxO19铁氧体的结构与磁性.磁性材料及器件,2008,39(4):22-25. |
| [9] | Wu H,Zhang R,Liu X,et al.Electrospinning of Fe,Co,and Ni nanofibers:synthesis,assembly,and magnetic properties.Chemistry of Materials,2007,19(14):3506-3511. |
| [10] | 李从举,翟国钧,付中玉,等(LI Cong-Ju,et al).TiO2纳米纤维无纺布的制备及光催化性能研究.无机化学学报(Chinese J.Inorg.Chem.),2006,11(22):2061-2064. |
| [11] | Ju Y W,Park J H,Jung H R,et al.Electrospun MnFe2O4 nanofibers:preparation and morphology.Conlposites Science and Technology,2008,68(7/8):1704-1709. |
| [12] | 郭远征,李从举,王娇娜(GUO Yuan-Zheng,et al).纳米BaFe12O19纤维的电纺制备及磁性研究.无机化学学报(ChineseJ.Inorg.Chem.),2009,25(6):1018-1021. |
| [13] | [131刘明权,沈湘黔,孟献丰,等(LIU Ming-Quan,et al).M型锶铁氧体纳米纤维静电纺丝和磁性能.无机材料学报(Journal of Inorganic Materials),2010,25(1):68-72. |
| [14] | Morel A,Le Breton J M,Kreisel J,et al.Sublattice occupation in Sr1-xLaxFe12-xCoxO19 hexagonal ferrite analyzed by Mossbauerspectrometry and Raman spectroscopy.Journal of Magnetism andMagnetic Materials,2002,242-245(Part 2):1405-1407. |
| [15] | Pieper M W,Morel A,Kools F.NMR analysis of La+Co doped M-type ferrites.Journal of Magnetism and Magnetic Materials,2002,242-245(Part 2):1408-1410. |
| [16] | NGA TTV,Hien T D,Duong N P,et al.Structural and magnetic properties of SrLaxFe12-xO19(x=0-0.15) prepared by using a Sol-Gel method.Journal of the Korean Physical Society,2008,52(5):1474-1477. |
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