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High-Temperature Annealing Iron Microplate with Excellent Microwave Absorption Performance and its Direct Micromagnetic Analysis by Electron Holography and Lorentz Microscopy

Abstract

To meet the demand of electromagnetic interference shielding, cheap and available microwave absorbers are urgently in need. Recently, most of the related researchs focus on more and more complicated absorbers composed of multi-component because of the better electromagnetic match. However, it is still a great challenge to develop one absorber simultaneously possessing the advantages of easy fabrication, low cost, ultra-wide bandwidth and strong absorption. Hence, a simple and convenient absorber with efficient performance has been attracting considerable attention because of urgent requirements. Here, a series of single component iron-based absorbers with different morphology and grain size were successfully prepared. A strong absorption intensity (~ -43.4 dB) was found in plate-like sample, which can even match to those of some multi-component absorbers. Electron holography and Lorentz microscopy analysis were used for the further comprehension of relationships among microstructure, electromagnetic property and microwave absorption performance. The primary grain size of our iron microplate was found fundamentally important to microwave absorption performance. This cheap and available absorber is believed as an optimal choice for single component absorbers and useful to the research of absorption mechanism.

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Publication details

The article was received on 10 Apr 2017, accepted on 12 May 2017 and first published on 15 May 2017


Article type: Paper
DOI: 10.1039/C7TC01544E
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    High-Temperature Annealing Iron Microplate with Excellent Microwave Absorption Performance and its Direct Micromagnetic Analysis by Electron Holography and Lorentz Microscopy

    W. B. You, W. She, Z. Liu, H. Bi and R. Che, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC01544E

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