静电纺丝法制备Sr1-xLaxFe12-xCoxO19纳米纤维及其磁性研究

doi:10.3724/SP.J.1077.2011.00797

无机材料学报 ›› 2011, Vol. 26 ›› Issue (8): 797-801.DOI: 10.3724/SP.J.1077.2011.00797 CSTR: 32189.14.SP.J.1077.2011.00797

静电纺丝法制备Sr_1-xLa_xFe_12-xCo_xO₁₉纳米纤维及其磁性研究

李从举^1,2, 张莲莲^1,2, 王娇娜^1,2

(1. 北京服装学院材料科学与工程学院, 北京 100029; 2. 北京市服装材料研究开发与评价重点实验室, 北京 100029)

收稿日期:2010-10-08 修回日期:2010-12-06 出版日期:2011-08-20 网络出版日期:2011-07-14
作者简介:李从举(1972-), 男, 博士, 教授. E-mail: congjuli@gmail.com
基金资助:
国家自然科学基金(51073005); 北京市自然科学基金(2112013); 北京市教委科技发展计划重点项目(KZ201010012012); 北京市属高等学校人才强教深化计划(IHLB); 国家863项目(2007AA021906); 国家973项目(2010CB933501)

Preparation and Magnetic Properties of Sr_1-xLa_xFe_12-xCo_xO₁₉Nanofibers by Electrospinning

LI Cong-Ju^1,2, ZHANG Lian-Lian^1,2, WANG Jiao-Na^1,2

(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)

摘要/Abstract

摘要： 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-xLa_xFe_12-xCo_xO₁₉(x=0~0.5)复合纳米纤维, 经过煅烧处理过程, 获得了Sr_1-xLa_xFe_12-xCo_xO₁₉ (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-xLa_xFe_12-xCo_xO₁₉ (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_c=432.02kA/m, M_s=54.7A·m²/kg, M_r=28.9A·m²/kg, 与传统溶胶-凝胶法在相同条件下制得的Sr_0.9La_0.1Fe_11.9Co_0.1O₁₉粉体样品相比, 磁性能也有显著提高.

关键词: 静电纺丝, M型SrFe₁₂O₁₉, La-Co取代, 磁性能

Abstract: PVP/Sr_1-xLa_xFe_12-xCo_xO₁₉(x=0-0.5) composite nanofiers were fabricated by Sol-Gel process and electrospinning technique. After high temperature calcination, Sr_1-xLa_xFe_12-xCo_xO₁₉(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 Sr_1-xLa_xFe_12-xCo_xO₁₉(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 Sr_1-xLa_xFe_12-xCo_xO₁₉(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 Sr_0.9La_0.1Fe_11.9Co_0.1O₁₉ 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 Sr_0.9La_0.1Fe_11.9Co_0.1O₁₉ powder samples.

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

中图分类号:

TQ174

李从举, 张莲莲, 王娇娜. 静电纺丝法制备Sr_1-xLa_xFe_12-xCo_xO₁₉纳米纤维及其磁性研究[J]. 无机材料学报, 2011, 26(8): 797-801.

LI Cong-Ju, ZHANG Lian-Lian, WANG Jiao-Na. Preparation and Magnetic Properties of Sr_1-xLa_xFe_12-xCo_xO₁₉Nanofibers by Electrospinning[J]. Journal of Inorganic Materials, 2011, 26(8): 797-801.

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静电纺丝法制备Sr_1-xLa_xFe_12-xCo_xO₁₉纳米纤维及其磁性研究

Preparation and Magnetic Properties of Sr_1-xLa_xFe_12-xCo_xO₁₉Nanofibers by Electrospinning

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