The Cobalt Zinc Spinel Ferrite Nanofiber: Lightweight and Efficient Microwave Absorber

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Abstract
To solve the heavy mass problem of the traditional spinel ferrite using as the microwave absorber, the Co x Zn (1− x ) Fe 2 O 4 ( x  =   0.2, 0.4, 0.6, 0.8) ferrite nanofibres were synthesized by electrospinning method. The phase composition, morphology, and electromagnetic properties were analyzed. The results showed that all the as‐prepared Co x Zn (1− x ) Fe 2 O 4 ferrites exhibited the homogeneous nanofibrous shape. The saturation magnetization and coercivity were enhanced by tuning the Co 2+ content. The electromagnetic loss analysis indicated that the Co 0.6 Zn 0.4 Fe 2 O 4 ferrite nanofiber performed the strongest microwave attenuation ability. The microwave absorbing coating containing 15 wt% of Co 0.6 Zn 0.4 Fe 2 O 4 ferrite nanofiber showed the reflection loss less than −10 dB in the whole X ‐band and 80% of the Ku ‐band frequencies. Meanwhile, the surface density was only 2.4 Kg/m 2 .
Funding Information
  • Scientific Research Startup Foundation of Nanjing University of Information Science & Technology (2013x022)

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