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Erschienen in: Journal of Materials Science 33/2020

27.08.2020 | Electronic materials

Bi-doped barium ferrite decorated polythiophene nanocomposite: influence of Bi-doping on structure, morphology, thermal and EMI shielding behavior for X-band

verfasst von: Sajid Iqbal, Halima Khatoon, R. K. Kotnala, Sharif Ahmad

Erschienen in: Journal of Materials Science | Ausgabe 33/2020

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Abstract

The electronic and communication devices such as mobile, laptop, and radio ease our day-to-day life. However, these devices emit harmful radiation, which affects human health and the environment. Therefore, to prevent such radiation-based pollution and provide a safer working environment, viable and promising EMI shielding materials have been investigated. Keeping this in mind, the present work reports the relatively low-temperature synthesis of bismuth-doped barium ferrite (BaBixFe12−xO19, Bi-BFO) nanoparticles and their nanocomposite via sol–gel and in situ emulsion polymerization approaches for their application in EMI shielding material. The influence of Bi-doping on phase purity, morphology, structure, and thermal behavior has been explored. The EMI shielding properties of these materials have been investigated in the X-band (8.2–12.4 GHz) region. The composite (Bi-BFO:PT = 2:1 Bi-BFO/PTh-21) with 1 mm thickness exhibited maximum shielding effectiveness (SE) of − 47.12 dB in the X-band region. The high shielding activity is mainly due to the efficient complementarities between the magnetic and dielectric loss. The doping of Bi in barium ferrite results in the increase in electrical polarization that led to the high dielectric loss, causing higher absorption of electromagnetic (EM) waves. These studies suggest that the nanocomposite may find its scope as an excellent microwave absorber for a wide frequency region.

Graphic abstract

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Metadaten
Titel
Bi-doped barium ferrite decorated polythiophene nanocomposite: influence of Bi-doping on structure, morphology, thermal and EMI shielding behavior for X-band
verfasst von
Sajid Iqbal
Halima Khatoon
R. K. Kotnala
Sharif Ahmad
Publikationsdatum
27.08.2020
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 33/2020
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-020-05134-z

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