中国物理B ›› 2014, Vol. 23 ›› Issue (8): 88105-088105.doi: 10.1088/1674-1056/23/8/088105

• SPECIAL TOPI—International Conference on Nanoscience & Technology, China 2013 • 上一篇    下一篇

Templated synthesis of highly ordered mesoporous cobalt ferrite and its microwave absorption properties

力国民a b, 王连成a, 徐耀a   

  1. a Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
    b University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2013-09-04 修回日期:2014-04-08 出版日期:2014-08-15 发布日期:2014-08-15

Templated synthesis of highly ordered mesoporous cobalt ferrite and its microwave absorption properties

Li Guo-Min (力国民)a b, Wang Lian-Cheng (王连成)a, Xu Yao (徐耀)a   

  1. a Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
    b University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2013-09-04 Revised:2014-04-08 Online:2014-08-15 Published:2014-08-15
  • Contact: Xu Yao E-mail:xuyao@sxicc.ac.cn

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摘要： Based on the nanocasting strategy, highly ordered mesoporous CoFe2O4 is synthesized via the‘two-solvent’impregnation method using a mesoporous SBA-15 template. An ordered two-dimensional (P6mm) structure is preserved for the CoFe2O4/SBA-15 composite after the nanocasting. After the SBA-15 template is dissolved by NaOH solution, a mesoporous structure composed of aligned nanoparticles can be obtained, and the P6mm structure of the parent SBA-15 is preserved. With a high specific surface area (above 90 m2/g) and ferromagnetic behavior, the obtained material shows potential in light weight microwave absorption application. The minimum reflection loss (RL) can reach -18 dB at about 16 GHz with a thickness of 2 mm and the corresponding absorption bandwidth is 4.5 GHz.

关键词: two-solvent, mesoporous, cobalt ferrite, microwave absorption

Abstract: Based on the nanocasting strategy, highly ordered mesoporous CoFe2O4 is synthesized via the‘two-solvent’impregnation method using a mesoporous SBA-15 template. An ordered two-dimensional (P6mm) structure is preserved for the CoFe2O4/SBA-15 composite after the nanocasting. After the SBA-15 template is dissolved by NaOH solution, a mesoporous structure composed of aligned nanoparticles can be obtained, and the P6mm structure of the parent SBA-15 is preserved. With a high specific surface area (above 90 m2/g) and ferromagnetic behavior, the obtained material shows potential in light weight microwave absorption application. The minimum reflection loss (RL) can reach -18 dB at about 16 GHz with a thickness of 2 mm and the corresponding absorption bandwidth is 4.5 GHz.

Key words: two-solvent, mesoporous, cobalt ferrite, microwave absorption

中图分类号:  (New materials: theory, design, and fabrication)

  • 81.05.Zx
81.16.-c (Methods of micro- and nanofabrication and processing) 77.84.-s (Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials) 75.47.Lx (Magnetic oxides)