IIIA-IIB multicomponent perovskite rare earth ferrites with promising electromagnetic wave absorption properties

• Published in: Journal of rare earths Vol. 42; no. 6; pp. 1118 - 1127
• Main Authors: He, Yanyan, Chen, Tao, Pan, Yanyu, Huang, Minzhong, Wang, Kaixian, Xue, Liyan, Li, Yazhu, Tan, Fengzhi, Yang, Fan, Xu, Tongkuan, Chen, Heng
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2024
• Subjects: Electromagnetic wave absorption; Entropy regulation; Multicomponent design; Rare earth ferrites; Rare earths; Rare earth ferrites; Electromagnetic wave absorption; Rare earths; Multicomponent design; Entropy regulation
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/j.jre.2024.03.019

Perovskite-type rare-earth ferrites (REFeO3) are promising materials for absorbing electromagnetic (EM) wave pollution. However, insufficient dielectric loss and poor impedance matching are key factors that limit the broader implementation of REFeO3. Herein, a series of multicomponent perovskite-type ferrites with strong EM wave absorption capabilities was prepared. Through the synergistic effect of chemical constitution regulation and entropy regulation, optimization of the dielectric loss and impedance matching is achieved by strengthening the structural defect mechanism, thus further adjusting the EM wave absorption performance. Compared with (LaGdSmNdBa)FeO3 (HE-1) and (LaGdPrSmNdBa)FeO3 (HE-2), (LaGdBa)FeO3 (ME-1) and (LaGdSmBa)FeO3 (ME-2) exhibit favorable performance, with optimal minimum reflection loss (RLmin) of −56.35 dB (at 11.12 GHz) and −63.25 dB (at 7.22 GHz) and effective absorption bandwidth (EAB) of 4.46 and 4.72 GHz, respectively. This multicomponent design provides a new strategy for the development of EM wave absorption materials. Multicomponent perovskite-type ferrites show excellent electromagnetic wave absorption properties. Through the synergistic effect of chemical constitution regulation and entropy regulation, the favorable performance is achieved by adjusting the structural defect mechanism. [Display omitted] •IIIB-IIA composite ceramic wave-absorbing materials with promising wave-absorbing properties were designed.•The entropy regulation and the effect of lattice distortion on the wave-absorbing properties were investigated.•The optimization of dielectric loss and impedance match is achieved by intensifying the structural defects mechanism.•The multicomponent ferrites delivered outstanding EMA performance with the RLmin of −63.25 dB and the EAB of 4.72 GHz.