One-pot synthesis and microwave absorbing properties of ultrathin SrFe12O19 nanosheets

Article abstract of DOI:10.1016/j.jallcom.2018.12.265

Ultrathin SrFe₁₂O₁₉ nanosheets were successfully synthesized by modified hydrothermal method. The structure, morphology and properties were characterized and investigated by using X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), Field emission scanning electron microscopy (FESEM), Transmission electron microscopy (TEM), Vibrating sample magnetometer (VSM) and Vector network analyzer (VNA). The results revealed that the temperature and diethylene glycol were responsible for ultrathin structure and good dispersity of SrFe₁₂O₁₉ nanosheets. The SrM nanosheets showed strong magnetocrystaline anisotropy and large coercive force, which enhanced microwave absorbing properties of SrFe₁₂O₁₉. The reflection loss (RL) of a composite absorber with thickness of 3.5 mm reached a maximum value of ?28.6 dB and the effective absorption bandwidth (RL < ?10 dB) was 0.92 GHz at the high frequency region, exhibiting excellent microwave absorbing properties as promising microwave absorber.

Full text of DOI:10.1016/j.jallcom.2018.12.265

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Accepted Manuscript
One-pot synthesis and microwave absorbing properties of ultrathin SrFe
nanosheets
O
12 19
Shenhui Dong, Chucheng Lin, Xianfeng Meng
PII:
S0925-8388(18)34821-7
DOI:
https://doi.org/10.1016/j.jallcom.2018.12.265
JALCOM 48908
Reference:
To appear in: Journal of Alloys and Compounds
Received Date: 23 October 2018
Revised Date: 4 December 2018
Accepted Date: 21 December 2018
Please cite this article as: S. Dong, C. Lin, X. Meng, One-pot synthesis and microwave absorbing
properties of ultrathin SrFe nanosheets, Journal of Alloys and Compounds (2019), doi: https://
O
12 19
doi.org/10.1016/j.jallcom.2018.12.265.
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ACCEPTED MANUSCRIPT

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ACCEPTED MANUSCRIPT
One-pot Synthesis and Microwave Absorbing Properties of
Ultrathin SrFe12O19 Nanosheets
Shenhui Donga,#, Chucheng Linb,#, Xianfeng Menga*
a. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013,
China
b. State Key Laboratory of High Performance Ceramics and Superfine Microstructure,
Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050,
China
# These authors contributed equally to this work.
Abstract
Ultrathin SrFe12O19 nanosheets were successfully synthesized by modified
hydrothermal method. The structure, morphology and properties were characterized and
investigated by using X-ray diffractometer (XRD), Fourier transform infrared
spectroscopy (FTIR), Field emission scanning electron microscopy (FESEM),
Transmission electron microscopy (TEM), Vibrating sample magnetometer (VSM) and
Vector network analyzer (VNA). The results revealed that the temperature and
diethylene glycol were responsible for ultrathin structure and good dispersity of
SrFe12O19 nanosheets. The SrM nanosheets showed strong magnetocrystaline anisotropy
and large coercive force, which enhanced microwave absorbing properties of SrFe12O19.
The reflection loss (RL) of a composite absorber with thickness of 3.5 mm reached a
maximum value of -28.6 dB and the effective absorption bandwidth (RL < -10 dB) was

Evaluation Only. Created with Aspose.PDF. Copyright 2002-2021 Aspose Pty Ltd.
ACCEPTED MANUSCRIPT
0.92 GHz at the high frequency region, exhibiting excellent microwave absorbing
properties as promising microwave absorber.
Keywords: Magnetic materials, Strontium hexaferrite, Ultrathin nanosheet, Microwave
absorber
1. Introduction
Electromagnetic interference and pollution are posing serious threat to human
health and electronic devices[1]. To resolve this problem, M-type SrFe12O19 (SrM) has
gained immense interest due to its large anisotropy field, high coercive force, low cost
and excellent chemical stability [2-4]. The excellent properties make SrM ferrite useful
for electromagnetic shielding and microwave absorption materials [5]. Therefore, many
strategies such as advanced synthesis techniques, cation substitution etc, have been
employed to improve microwave absorbing properties of SrM ferrite [6-9]. However,
the radiation absorption performance of SrM ferrite still remains relatively modest. It is
well known, the magnetic properties and microwave absorbing properties of SrM ferrite
depend strongly on its microstructure, grain size and particle shape [10]. Unfortunately,
most reported SrM particles are suffering from the uncontrolled particle sizes and
agglomeration. Thus so far, the preparation of SrM nanoparticles with nice dispersity
and pure phase is still maintain the challenge. Herein, we reported ultrathin SrFe12O19
nanosheets with high aspect ratio and good dispersity, which were synthesized by
modified hydrothermal method. The effect of temperature on structure, morphology and