Enabling highly efficient and broadband electromagnetic wave absorption by tuning impedance match in high-entropy transition metal diborides (HE TMB2)

doi:10.1007/s40145-021-0505-y

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	Enabling highly efficient and broadband electromagnetic wave absorption by tuning impedance match in high-entropy transition metal diborides (HE TMB2)
	Zhang,Weiming 2; Dai,Fu-Zhi 2; Xiang,Huimin 2; Zhao,Biao 3; Wang,Xiaohui 1; Ni,Na 4; Karre,Rajamallu 4; Wu,Shijiang 5; Zhou,Yanchun 2
刊名	Journal of Advanced Ceramics
	2021-09-16
卷号	10 期号:6
关键词	transition metal diboride (TMB2) high-entropy (HE) ceramics electronic structure microwave absorption dielectric and magnetic losses coupling
ISSN号	2226-4108
DOI	10.1007/s40145-021-0505-y
通讯作者	Zhou,Yanchun(yczhou@alum.imr.ac.cn)
英文摘要	AbstractThe advance in communication technology has triggered worldwide concern on electromagnetic wave pollution. To cope with this challenge, exploring high-performance electromagnetic (EM) wave absorbing materials with dielectric and magnetic losses coupling is urgently required. Of the EM wave absorbers, transition metal diborides (TMB2) possess excellent dielectric loss capability. However, akin to other single dielectric materials, poor impedance match leads to inferior performance. High-entropy engineering is expected to be effective in tailoring the balance between dielectric and magnetic losses through compositional design. Herein, three HE TMB2 powders with nominal equimolar TM including HE TMB2-1 (TM = Zr, Hf, Nb, Ta), HE TMB2-2 (TM = Ti, Zr, Hf, Nb, Ta), and HE TMB2-3 (TM = Cr, Zr, Hf, Nb, Ta) have been designed and prepared by one-step boro/carbothermal reduction. As a result of synergistic effects of strong attenuation capability and impedance match, HE TMB2-1 shows much improved performance with the optimal minimum reflection loss (RLmin) of ?59.6 dB (8.48 GHz, 2.68 mm) and effective absorption bandwidth (EAB) of 7.6 GHz (2.3 mm). Most impressively, incorporating Cr in HE TMB2-3 greatly improves the impedance match over 1–18 GHz, thus achieving the RLmin of ?56.2 dB (8.48 GHz, 2.63 mm) and the EAB of 11.0 GHz (2.2 mm), which is superior to most other EM wave absorbing materials. This work reveals that constructing high-entropy compounds, especially by incorporating magnetic elements, is effectual in tailoring the impedance match for highly conductive compounds, i.e., tuning electrical conductivity and boosting magnetic loss to realize highly efficient and broadband EM wave absorption with dielectric and magnetic coupling in single-phase materials.
语种	英语
出版者	Tsinghua University Press
WOS记录号	BMC:10.1007/S40145-021-0505-Y
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/166511]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhou,Yanchun
作者单位	1.Chinese Academy of Sciences; Shenyang National Laboratory for Materials Science, Institute of Metal Research 2.Aerospace Research Institute of Materials & Processing Technology; Science and Technology on Advanced Functional Composite Laboratory 3.Zhengzhou University of Aeronautics; Henan Key Laboratory of Aeronautical Materials and Application Technology, School of Material Science and Engineering 4.Shanghai Jiao Tong University; Key Lab of Education Ministry for Power Machinery and Engineering, School of Mechanical Engineering 5.Zibo Firststar New Material Incorporated Co., Ltd.
推荐引用方式 GB/T 7714	Zhang,Weiming,Dai,Fu-Zhi,Xiang,Huimin,et al. Enabling highly efficient and broadband electromagnetic wave absorption by tuning impedance match in high-entropy transition metal diborides (HE TMB2)[J]. Journal of Advanced Ceramics,2021,10(6).
APA	Zhang,Weiming.,Dai,Fu-Zhi.,Xiang,Huimin.,Zhao,Biao.,Wang,Xiaohui.,...&Zhou,Yanchun.(2021).Enabling highly efficient and broadband electromagnetic wave absorption by tuning impedance match in high-entropy transition metal diborides (HE TMB2).Journal of Advanced Ceramics,10(6).
MLA	Zhang,Weiming,et al."Enabling highly efficient and broadband electromagnetic wave absorption by tuning impedance match in high-entropy transition metal diborides (HE TMB2)".Journal of Advanced Ceramics 10.6(2021).