title: Enhanced Microwave Absorption Properties by Tuning Cation Deficiency of Perovskite Oxides of Two-Dimensional LaFeO3/C Composite in X-Band.
abstract: Development of microwave absorption materials with tunable thickness and bandwidth is particularly urgent for practical applications but remains a great challenge. Here, two-dimensional nanocomposites consisting of perovskite oxides (LaFeO3) and amorphous carbon were successfully obtained through a one pot with heating treatment using sodium chloride as a hard template. The tunable absorption properties were realized by introducing A-site cation deficiency in LaFeO3perovskite. Among the A-site cation-deficient perovskites, La0.62FeO3/C (L0.62FOC) has the best microwave absorption properties in which the maximum absorption is -26.6 dB at 9.8 GHz with a thickness of 2.94 mm and the bandwidth range almost covers all X-band. The main reason affecting the microwave absorption performance was derived from the A-site cation deficiency which induced more dipoles polarization loss. This work proposes a promising method to tune the microwave absorption performance via introducing deficiency in a crystal lattice.
authors.affiliation: Department of Materials Science and Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University , Xiamen 361005, China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Liu
authors.affiliation: Department of Materials Science and Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University , Xiamen 361005, China.
authors.forename: Lai-Sen
authors.initials: LS
authors.lastname: Wang
authors.affiliation: Department of Materials Science and Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University , Xiamen 361005, China.
authors.forename: Yating
authors.initials: Y
authors.lastname: Ma
authors.affiliation: Department of Materials Science and Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University , Xiamen 361005, China.
authors.forename: Hongfei
authors.initials: H
authors.lastname: Zheng
authors.affiliation: Department of Materials Science and Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University , Xiamen 361005, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Lin
authors.affiliation: Department of Materials Science and Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University , Xiamen 361005, China.
authors.forename: Qinfu
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Department of Materials Science and Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University , Xiamen 361005, China.
authors.forename: Yuanzhi
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Department of Materials Science and Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University , Xiamen 361005, China.
authors.forename: Yulong
authors.initials: Y
authors.lastname: Qiu
authors.affiliation: Department of Materials Science and Engineering, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University , Xiamen 361005, China.
authors.forename: Dong-Liang
authors.identifier: http://orcid.org/0000-0003-4155-4766
authors.initials: DL
authors.lastname: Peng
keywords: LaFeO3/C; deficiency; dipole polarization; microwave absorption; perovskites