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Synthesis, Characterization and Properties of PANI/(La-Nd Doped BaFe12O19) Composites

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Abstract:

La-Nd co-doped barium hexaferrites, Ba0.7(LamNdn)0.3Fe12O19 (D-BaM), were successfully prepared by sol-gel method. PANI / D-BaM composites were synthesized by in-situ polymerization in solution. The structure, morphology and properties of samples have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), vibrating sample magnetometer (VSM), four-probe conductivity tester and vector network analyzer. The XRD patterns showed that the crystal structure of all the samples exist as M-type phases. The SEM images revealed that the particles presented a hexagonal platelet-like morphology. The magnetic properties could be improved by substitutions of La and Nd ions. The saturation magnetization (Ms) and coercive force (Hc) increased with the change of La / Nd ratio to the maximum at La / Nd = 3:1. The doped particles have also been embedded in conductive PANI to prepare electromagnetic materials, and the conductivity kept on the order of 10-2. The microwave absorbing properties of composites at 30 MHz-6 GHz improved obviously, the peak value of reflection loss could reach-7.5 dB.

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Periodical:

Key Engineering Materials (Volume 727)

Pages:

327-334

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.727.327

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Online since:

January 2017

Authors:

Yan Wang, Jun Wang, Xiao Fei Zhang, Ya Qing Liu

Keywords:

Magnetic, Microwave Absorbing, PANI/(La-Nd Doped BaFe12O19)

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