Repository of Research and Investigative Information

Repository of Research and Investigative Information

Baqiyatallah University of Medical Sciences

Synthesis, characterization, magnetic and microwave absorption properties of iron-cobalt nanoparticles and iron-cobalt nanocomposites

(2018) Synthesis, characterization, magnetic and microwave absorption properties of iron-cobalt nanoparticles and iron-cobalt nanocomposites. Journal of Materials Science-Materials in Electronics. pp. 12126-12134. ISSN 0957-4522

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Synthesis, characterization, magnetic and microwave absorption properties of iron–cobalt nanoparticles and iron–cobalt @ polyaniline (FeCo@PANI) nanocomposites.pdf

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Abstract

In this research, iron-cobalt nanoparticles and iron-cobalt polyaniline nanocomposite was prepared using two-step process including polyol process and in situ chemical oxidative polymerization. X-ray diffraction confirms the formation of FeCo alloy. As seen in VSM results FeCoPANI nanocomposite leading to lower saturation magnetization and higher natural-resonance frequency than FeCo alloy. The effect of various parameters including solvent type, NaOH amount, sugar amount, sugar type, Fe/Co ratio and precursor type on the magnetic properties of prepared FeCo alloy have been investigated in details. The electromagnetic absorption characteristics of nanoparticle and nanocomposite were determined in the frequency range of 8-18 GHz. Results show that the PANI improves electromagnetic wave absorption properties of FeCo nanoparticles. The main mechanism enhancing the dielectric loss tangent is Deby's dual relaxation phenomenon and for magnetic loss is the ferromagnetic resonance. The maximum reflection loss of - 5.48 dB was obtained for 40 wt FeCoPANI nanocomposite with an effective absorption band (RL < - 3 dB) of 1.22 GHz.

Item Type: Article
Keywords: polymeric capping agents sol-gel method absorbing properties polyol process electromagnetic properties facile synthesis particles nanostructure performance composites Engineering Materials Science Physics
Divisions:
Page Range: pp. 12126-12134
Journal or Publication Title: Journal of Materials Science-Materials in Electronics
Journal Index: ISI
Volume: 29
Number: 14
Identification Number: https://doi.org/10.1007/s10854-018-9320-9
ISSN: 0957-4522
Depositing User: مهندس مهدی شریفی
URI: http://eprints.bmsu.ac.ir/id/eprint/3708

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