吉林大学学报(理学版)

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SrFeO3-δ纳/微米纤维的制备及其磁性

冷静1, 刘润茹2, 王德军3, 李霜4, 王丽丽2   

  1. 1. 长春工业大学 基础科学学院, 长春 130012; 2. 长春大学 理学院, 长春 130022;3. 长春大学 继续教育学院, 长春 130022; 4. 长春理工大学 理学院, 长春 130022
  • 收稿日期:2013-01-13 出版日期:2013-09-26 发布日期:2013-09-17
  • 通讯作者: 刘润茹 E-mail:345653232@qq.com

Preparation of SrFeO3-δ Micro-nanofibers andIts Magnetic Properties

LENG Jing1, LIU Runru2, WANG Dejun3, LI Shuang4, WANG Lili2   

  1. 1. School of Basic Sciences, Changchun University of Technology, Changchun 130012, China; 2. College of Science, Changchun University, Changchun
    130022, China;3. College of Continuing Education, Changchun University, Changchun 130022, China;4. School of Science, Changchun University of Science and Technology, Changchun 130022, China
  • Received:2013-01-13 Online:2013-09-26 Published:2013-09-17
  • Contact: LIU Runru E-mail:345653232@qq.com

摘要:

利用静电纺丝法与溶胶凝胶技术, 制备PVP/Sr(OOCCH3)2·0.5H2OC15H21FeO6复合纳米纤维, 热处理后得到了SrFeO3-δ纳/微米纤维, 并采用X射线衍射(XRD)、 扫描电镜(SEM)、 透射电镜(TEM)和超导量子干涉仪磁强计(SQUID)研究纤维样品的晶体结构、 微观形貌及其磁性. 实验结果表明: PVP/Sr(OOCCH3)2·0.5H2OC15H21FeO6复合纤维表面光滑, 长直连续, 平均直径约为500 nm; 在空气气氛下, 经800 ℃焙烧2 h后得到的SrFeO3-δ纳/微米纤维均为较纯的立方钙钛矿型结构, 平均晶粒尺寸约为32 nm, 纤维直径为260~480 nm, 平均直径约为400 nm, 具有较大长径比; 当温度为175 ℃时, SrFeO3-δ纤维样品的磁化率有极大值, 磁性纳米效应的影响及SrFeO3-δ中螺旋反铁磁有序性、 顺磁性和铁磁性的共同作用使得纤维样品与块体样品的磁学性能不同, 其Neel温度与Curie温度均升高.

关键词: 静电纺丝, 纳米纤维, SrFeO3-&delta,

Abstract:

Dihydrogen bonds PVP/SFO composite fibers were synthesized via solgel process combined with electrospinning technology. After high
temperature calcination, perovokite structure SrFeO3-δ nanofibers were successfully prepared. The samples of micronanofibers were investigated on
a scanning electro microscope (SEM), a transmission electron microscope(TEM), an Xray diffractometer (XRD) and a superconducting quantum interference device (SQUID), respectively. The results show that the PVP/SFO composite nanofibers had smooth surfaces and the average diameter was about 500 nm. The orthogonal perovokite structure SrFeO3-δ micronanofibers were obtained by calcining at 800 ℃ for 2 h in air, with the diameter ranged from 260—480 nm and an average fiber diameter of about 400 nm and an average grain size of 32 nm. Magnetic property measurements suggest that the Neel temperature and the Curie temperature of the fiber samples were higher than those of the bulk materials.

Key words: electrospinning, nanofiber, SrFeO3-δ

中图分类号: 

  • O469