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高等学校化学研究 ›› 2016, Vol. 32 ›› Issue (4): 678-681.doi: 10.1007/s40242-016-5457-3

• Articles • 上一篇    下一篇

Synthesis of Magnetic Nickel Ferrite Microspheres and Their Microwave Absorbing Properties

JIAO Qingze1,2, WANG Yanfeng1, HAO Liang1, LI Hansheng1, ZHAO Yun1   

  1. 1. School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, P. R. China;
    2. School of Chemical Engineering and Materials Science, Beijing Institute of Technology, Zhuhai, Zhuhai 519085, P. R. China
  • 收稿日期:2015-11-26 修回日期:2016-03-02 出版日期:2016-08-01 发布日期:2016-04-20
  • 通讯作者: ZHAO Yun E-mail:zhaoyun@bit.edu.cn
  • 基金资助:

    Supported by the National Natural Science Foundation of China(Nos.21376029, 21071017).

Synthesis of Magnetic Nickel Ferrite Microspheres and Their Microwave Absorbing Properties

JIAO Qingze1,2, WANG Yanfeng1, HAO Liang1, LI Hansheng1, ZHAO Yun1   

  1. 1. School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, P. R. China;
    2. School of Chemical Engineering and Materials Science, Beijing Institute of Technology, Zhuhai, Zhuhai 519085, P. R. China
  • Received:2015-11-26 Revised:2016-03-02 Online:2016-08-01 Published:2016-04-20
  • Contact: ZHAO Yun E-mail:zhaoyun@bit.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.21376029, 21071017).

摘要:

NiFe2O4 microspheres were synthesized using a solvothermal method. The morphologies and structures of NiFe2O4 micropheres were characterized via a field emission scanning electron microscope(FESEM), a transmission electron microscope(TEM) and an X-ray diffractometer(XRD). The NiFe2O4 microspheres were around 150-200 nm in diameter and assembled by nanoparticles. The magnetic and electromagnetic parameters were measured using a vibrating sample magnetometer and a vector network analyzer, respectively. The obtained products exhibited a saturation magnetization of 60.8 A·m2·kg-1 at room temperature. A minimum reflection loss(RL) of -27.8 dB was observed at 9.2 GHz with a thickness of 3.5 mm, and the effective absorption frequency(RL<-10 dB) ranged from 8.2 GHz to 11.2 GHz, indicating the excellent microwave absorption performance of the NiFe2O4 microspheres in the X-band frequencies.

关键词: Nickel ferrite microsphere, Magnetic property, Microwave absorption property

Abstract:

NiFe2O4 microspheres were synthesized using a solvothermal method. The morphologies and structures of NiFe2O4 micropheres were characterized via a field emission scanning electron microscope(FESEM), a transmission electron microscope(TEM) and an X-ray diffractometer(XRD). The NiFe2O4 microspheres were around 150-200 nm in diameter and assembled by nanoparticles. The magnetic and electromagnetic parameters were measured using a vibrating sample magnetometer and a vector network analyzer, respectively. The obtained products exhibited a saturation magnetization of 60.8 A·m2·kg-1 at room temperature. A minimum reflection loss(RL) of -27.8 dB was observed at 9.2 GHz with a thickness of 3.5 mm, and the effective absorption frequency(RL<-10 dB) ranged from 8.2 GHz to 11.2 GHz, indicating the excellent microwave absorption performance of the NiFe2O4 microspheres in the X-band frequencies.

Key words: Nickel ferrite microsphere, Magnetic property, Microwave absorption property