Broadband microwave absorption of Fe3O4-BaTiO3 composites enhanced by interfacial polarization and impedance matching

被引：107
|
作者：
Huang, Yue [1 ]
Ji, Jindou [2 ]
Chen, Yan [1 ]
Li, Xiang [1 ]
He, Jun [3 ]
Cheng, Xingwang [1 ]
He, Shuli [4 ]
Liu, Ying [1 ]
Liu, Jiping [1 ]
机构：
[1] Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China
[2] Beijing Univ Sci & Technol, Sch Math & Phys, Beijing 100083, Peoples R China
[3] Cent Iron & Steel Res Inst, Div Funct Mat, Beijing 100081, Peoples R China
[4] Capital Normal Univ, Dept Phys, Beijing 100048, Peoples R China
来源：
COMPOSITES PART B-ENGINEERING | 2019年 / 163卷
基金：
中国国家自然科学基金;
关键词：
Microwave absorption; Multiferroic; Impedance matching; Hydrothermal method; STEP HYDROTHERMAL SYNTHESIS; BARIUM-TITANATE; ELECTROMAGNETIC CHARACTERISTICS; FACILE SYNTHESIS; NANOCOMPOSITES; FERRITE; RATIO;
D O I：
10.1016/j.compositesb.2019.01.008
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nanocomposites composed of magnetic and dielectric materials are suitable for high performance electromagnetic wave absorbers due to their great impedance matching. In this work, the microwave absorbing properties of Fe3O4-BaTiO3 composites were investigated over a frequency range of 1-18 GHz Fe3O4-BaTiO3 composites present significantly enhanced microwave absorption performance compared with BaTiO3. For the optimal Fe3O4(x)-BaTiO3(1-x) (x = 0.8) composite, the reflection loss (RL) could reach -47.4 dB at 12.26 GHz with a matching thickness of 2.2 mm, the bandwidth below -10 dB is 5.0 GHz, which is six times higher than BaTiO3. The broadened absorption bandwidth is resulted from better impedance matching. This results show that Fe3O4-BaTiO3 composites can be used as an excellent microwave absorption materials with strong absorption and broad bandwidth.
引用
收藏
页码：598 / 605
页数：8
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