Synthesis and microwave absorbing properties of polyaniline/CoFe₂O₄/Ba_0.4Sr_0.6TiO₃ composites

详细信息    查看全文

• 作者：Haibo Yang ; Ning Han ; Ying Lin ; Pan Kang…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：27
• 期：10
• 页码：10849-10854
• 全文大小：2,024 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Characterization and Evaluation Materials
  
• 出版者：Springer New York
• ISSN：1573-482X
• 卷排序：27

文摘

Polyaniline(PANI)/CoFe₂O₄/Ba_0.4Sr_0.6TiO₃ composites were prepared by an in situ polymerization method. The phase structure, morphology and electromagnetic properties of the samples were characterized by X-ray diffraction, scanning electron microscope, transmission electron microscopy, Fourier transform infrared spectrum, vibrating sample magnetometer and vector network analyzer, respectively. Measurements of the reflection loss (RL) show that the maximum RL value of the PANI/0.1CoFe₂O₄/0.9Ba_0.4Sr_0.6TiO₃ composite is 30.2 dB at 5.6 GHz with the thickness of 3 mm and the bandwidth below 10 dB is 2.6 GHz (from 4.2 to 7.8 GHz). The results indicate that CoFe₂O₄ and Ba_0.4Sr_0.6TiO₃ particles are efficiently coated by PANI so that the PANI/CoFe₂O₄/Ba_0.4Sr_0.6TiO₃ composites exhibit an enhanced impedance matching between the dielectric and magnetic loss. Therefore, this kind of composites may have the potential as high-efficient absorber for microwave absorbing applications.