TY - JOUR
T1 - Controllable synthesis of ScFeO3 ceramics with microstructural evolution for thin and broadband high-performance microwave absorption
AU - Wei, Hanjun
AU - Yu, Yaping
AU - Feng, Pei
AU - Xue, Jimei
AU - Pan, Jinyuan
AU - Zhao, Feng
AU - Wang, Qingyuan
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/12/5
Y1 - 2022/12/5
N2 - 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 ºC 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.
AB - 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 ºC 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.
KW - Microstructure
KW - Microwave absorption properties
KW - ScFeO ceramics
KW - Sintering temperature
UR - http://www.scopus.com/inward/record.url?scp=85136097026&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2022.166826
DO - 10.1016/j.jallcom.2022.166826
M3 - 文章
AN - SCOPUS:85136097026
SN - 0925-8388
VL - 925
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 166826
ER -