Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 925, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2022.166826
Keywords
ScFeO3 ceramics; Microstructure; Sintering temperature; Microwave absorption properties
Categories
Funding
- National Natural Science Foundation of China [11672254, 51902257]
- Applied Basic Research Programs of Science and Technology Department of Sichuan Province [2020YJ0479]
- Chengdu University [2081922006]
- Basic Research Foundation of Engineering University of PAP [WJY202153]
- Basic Frontier Innovation Foundation of Engineering University of PAP [WJY202228]
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Controlled microstructures are critical for enhancing the microwave absorption properties of materials. ScFeO3 ceramics with a controllable three-dimensional network structure were successfully prepared by adjusting the sintering temperature, and the effect of sintering temperature on microstructure and microwave absorption properties was investigated.
Controlled microstructures play a pivotal role in upgrading the microwave absorption properties of materials. Herein, ScFeO3 ceramics with a controllable three-dimensional (3D) network structure were prepared by adjusting the sintering temperature. Specifically, the effect of sintering temperature on microstructure and microwave absorption properties were investigated. The results show that ScFeO3 ceramics with the sintering temperature of 1300 C possess the superior dielectric and magnetic loss capabilities for incident microwaves, which attributes to the ideal 3D network microstructure enhancing the impedance matching characteristic. Besides, this unique 3D network microstructure not only provides multiple channels for multiple reflecting and scattering of microwaves, but also offers abundant interfaces to dissipate microwaves. Furthermore, the natural resonance effect efficiently increases the magnetic loss. The optimal ScFeO3 samples possess the minimum reflection coefficient (RCmin) of - 57.4 dB at 17.44 GHz with a thickness of 2.45 mm and an effective absorption bandwidth (EAB) covering the whole Ku band (5.6 GHz) with a thickness range of 1.35-1.55 mm. It is believed that ScFeO3 ceramics can be new promising microwave absorption material with thin, broadband, and strong absorption performance. (C) 2022 Elsevier B.V. All rights reserved.
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