Behavior of microwave absorption of BiFeO3 nanoparticles fabricated by sol-gel method

Recently, using microwave devices that emit electromagnetic waves and enhance the convenience of life have increased; however, they can be harmful to the environment. In this study, CuFe2O4 nanoparticles were prepared through the conventional sol-gel procedure and then were characterized by X-ray powder diffraction (XRD), vibrating sample magnetometer (VSM), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FT-IR), and vector network analyzer (VNA) using S parameters. Results illustrated that pure crystal structure of magnetic nanoparticles has been synthesized by the sol-gel method with magnetic saturation (Ms) of 22 emu/g. Finally, CuFe2O4 nanoparticles were composited by silicone rubber to investigate its microwave absorption properties. Results showed that the CuFe2O4/silicone rubber nanocomposite absorbed more than 94.87% of the microwave irradiation at ku-band frequency with 1.7 mm thickness and the maximum reflection loss was −60.38 dB at 16.1 GHz. Magnetic and dielectric properties of the CuFe2O4 nanoparticles and silicone rubber polymeric matrix in the nanocomposite demonstrated desirable microwave absorption properties.

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Preparation and Electromagnetic Property of Hexagonal W-Type Ferrite Obtained by the Sol-Gel Method

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.474-476.1044 ◽

2011 ◽

Vol 474-476 ◽

pp. 1044-1048

Author(s):

Zheng Xiong ◽

Zhu Xi ◽

Zhang Li Jun

Keyword(s):

Microwave Absorption ◽

Reflection Loss ◽

Sol Gel ◽

Electromagnetic Property ◽

Element Composition ◽

Vector Network Analyzer ◽

Network Analyzer ◽

Electromagnetic Parameters ◽

Gel Method ◽

Sol Gel Method

Hexagonal W-type ferrite BaZn0.6Co1.4Fe16O27 was prepared by the sol-gel method. The formation, microstructure, element composition and phases were analyzed by TG-DTA, SEM, EDS and XRD. The electromagnetic parameters and microwave absorption capability were measured by the microwave vector network analyzer. The results showed that the reflection loss of the ferrite BaZn0.6Co1.4Fe16O27 in the spectrum of 8-18GHz came up to -10dB and came up to -20dB in the spectrum of 9.5-16.4GHz.

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Size-controlled synthesis of BiFeO3 nanoparticles by a facile and stable sol–gel method

Journal of Materials Science Materials in Electronics ◽

10.1007/s10854-016-5186-x ◽

2016 ◽

Vol 27 (10) ◽

pp. 10803-10809 ◽

Cited By ~ 2

Author(s):

Ben Qin ◽

Yiping Guo ◽

Di Pan ◽

Chongyang Sun ◽

Xingyu Wang ◽

...

Keyword(s):

Sol Gel ◽

Controlled Synthesis ◽

Gel Method ◽

Sol Gel Method ◽

Bifeo3 Nanoparticles ◽

Size Controlled

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Preparation and Identification of BaFe2O4 Nanoparticles by the Sol–Gel Route and Investigation of Its Microwave Absorption Characteristics at Ku-Band Frequency Using Silicone Rubber Medium

Proceedings ◽

10.3390/ecms2018-05234 ◽

2018 ◽

Vol 2 (17) ◽

pp. 5234

Author(s):

Reza Peymanfar ◽

Mitra Rahmanisaghieh ◽

Arezoo Ghaffari ◽

Yousef Yassi

Keyword(s):

Microwave Absorption ◽

Silicone Rubber ◽

Sol Gel ◽

Microwave Absorption Properties ◽

Band Frequency ◽

Gel Method ◽

Sol Gel Method ◽

High Frequency Devices ◽

Spinel Structures ◽

Ku Band

In the last decade, spinel structures have been widely explored due to widespread applications in antibacterial nanocomposites, memory devices, catalysts, photocatalysts, high-frequency devices, and electromagnetic absorbing materials. In this study, BaFe2O4 spinel structures were synthesized through the sol–gel method using a low sintering temperature and were identified by vibrating sample magnetometer (VSM), X-ray powder diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FE-SEM), and vector network analyzer (VNA) analysis. Results showed that uniform and pure crystal structures of BaFe2O4 nanoparticles were prepared based on the sol–gel method. Finally, BaFe2O4 nanoparticles were blended by silicone rubber to characterize the microwave absorption properties of the nanocomposite at the ku-band frequency. According to the VNA results, the BaFe2O4/silicone rubber nanocomposite with 1.75 mm thickness absorbed more than 94.38% of microwave irradiation along the ku-band frequency and the maximum reflection loss of the BaFe2O4/silicone rubber nanocomposite was 51.67 dB at 16.1 GHz.

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