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Synthesis of mesoporous hexagonal cobalt nanosheets with low permittivity for enhancing microwave absorption performances

文献类型：期刊论文

作者Zhang, Yilin1,2; Piao, Mingxing1; Zhang, Heng1; Zhang, Feng2; Chu, Jin1; Wang, Xiao1; Shi, Haofei1; Li, Chaolong1
刊名JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
出版日期2019-09-15
卷号486页码:10
ISSN号0304-8853
关键词Precursor directed synthesis Hexagonal cobalt nanosheets Mesoporous structure Superior microwave absorption
DOI10.1016/j.jmmm.2019.165272
通讯作者Zhang, Feng(zf080707@cqut.edu.cn) ; Li, Chaolong(lichaolong@cigit.ac.cn)
英文摘要In this study, regular hexagonal cobalt (Co) nanosheets with mesoporous structure have been successfully prepared on a large scale uniformly through precursor directed synthesis route. In contrast to the traditional ball milling technique, such Co nanosheets were controllable and repeatable in lateral dimension and thickness. The radial length of the Co nanosheets was observed in the range of 3-5 mu m with the average thickness of 120 nm. Such flaky shape was proved to be beneficial to break the Snoek limit, resulting in appreciable permeability in high frequency range. In addition, the mesoporous structure is favorable of lowering the permittivity and suppressing eddy current effect. Consequently, excellent microwave absorption performances could be achieved through adequate synergy of the attenuation competence and impedance matching. The minimum reflection loss (RL) value of - 45.1 dB was realized with a thickness of 2 mm, and the effective bandwidth (RL < -10 dB) could be reached 8.5 GHz. To the best of our knowledge, this is the largest effective bandwidth compared with those of Co-based materials derived from diverse elaborate superstructures. Such unique morphology and microstructure could provide new insights to design superior microwave absorbers depending on ferromagnetic metals and a series of composites.
资助项目National Natural Science Foundation of China[61601434] ; National Natural Science Foundation of China[51602306] ; Venture Innovation Support Program for Chongqing Overseas Returnees[cx2018134] ; Natural Science Foundation of Chongqing, China[cstc2018jcyjAX0312] ; Natural Science Foundation of Chongqing, China[cstc2018jcyjAX3609] ; Basic Science and Frontier Technology Research Program of Chongqing[2016jcyjA0166]
WOS研究方向Materials Science ; Physics
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000471859200032
源URL[http://119.78.100.138/handle/2HOD01W0/8218]  
专题微纳制造与系统集成研究中心
通讯作者Zhang, Feng; Li, Chaolong
作者单位1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Multiscale Mfg Technol, Chongqing 400714, Peoples R China
2.Chongqing Univ Technol, Phys & Energy Dept, Chongqing 400054, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Yilin,Piao, Mingxing,Zhang, Heng,et al. Synthesis of mesoporous hexagonal cobalt nanosheets with low permittivity for enhancing microwave absorption performances[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,2019,486:10.
APA Zhang, Yilin.,Piao, Mingxing.,Zhang, Heng.,Zhang, Feng.,Chu, Jin.,...&Li, Chaolong.(2019).Synthesis of mesoporous hexagonal cobalt nanosheets with low permittivity for enhancing microwave absorption performances.JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,486,10.
MLA Zhang, Yilin,et al."Synthesis of mesoporous hexagonal cobalt nanosheets with low permittivity for enhancing microwave absorption performances".JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 486(2019):10.

入库方式： OAI收割

来源：重庆绿色智能技术研究院

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