journal article·2011-09-13

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

Cong-Ju LI, Lian-Lian ZHANG, Jiao-Na WANG

Journal of Inorganic Materials· Volume 26· Issue 8
Publisher page

Abstract

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/Sr 1- x La x Fe 12- x Co x O 19 ( x =0~0.5)复合纳米纤维, 经过煅烧处理过程, 获得了Sr 1- x La x Fe 12- x Co x O 19 ( 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Sr 1- x La x Fe 12- x Co x O 19 ( 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SrFe 12 O 19 、LaFeO 3 和CoFe 2 O 4 ; 在适当范围内( x ≤0.1), La 3+ -Co 2+ 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 c =432.02kA/m, M s =54.7A·m 2 /kg, M r =28.9A·m 2 /kg, 与传统溶胶-凝胶法在相同条件下制得的Sr 0.9 La 0.1 Fe 11.9 Co 0.1 O 19 粉体样品相比, 磁性能也有显著提高.
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Research context

OpenAlex topics: Supercapacitor Materials and Fabrication · Electrospun Nanofibers in Biomedical Applications · ZnO doping and properties

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