Interface polarization strategy to prepare Sn/SnO2@C absorber with tunable core compositions and broader frequency absorption properties
文献类型： 外文期刊
作者： Wang, Haitao 1 ; Zheng, Yan 2 ; Cui, Wenyu 3 ; Sun, Yanchun 1 ; Zhang, Dongxing 4 ;
作者机构： 1.Minist Agr, Chinese Acad Fishery Sci, Heilongjiang River Fisheries Res Inst, Lab Qual & Safety Risk Assessment Aquat Prod Harb, Harbin 150070, Heilongjiang, Peoples R China
2.Harbin Fiber Reinforced Plast Inst Co Ltd, Harbin 150029, Heilongjiang, Peoples R China
3.Harbin Univ Commerce, Sch Pharm, Harbin 150076, Heilongjiang, Peoples R China
4.Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China
关键词： Interface polarization; Hollow nano-sphere; Core-shell; Tunable core composition; Sn/SnO2@C; Bandwidth frequency
期刊名称：APPLIED SURFACE SCIENCE （ 影响因子：6.707； 五年影响因子：5.905 ）
ISSN： 0169-4332
年卷期： 2018 年 455 卷
页码：
收录情况： SCI
摘要： Core-shell shaped composites with tunable core compositions have been successfully synthesized by a two-step method. Initial, SnO2@C was prepared by fixing the hollow SnO2 nanospheres into the void of amorphous carbon. Followed by another annealing treatment, SnO2 was gradually reduced to metallic Sn in a mixed H-2/N-2 atmosphere and leaded to Sn/SnO2 or Sn cores. Subsequently, the original SnO2 hollow nanospheres in the core was collapsed and transformed from clusters to nanoparticles. The electromagnetic absorption properties were significant improved for the binary composite (Sn/SnO2@C) as compared to SnO2 hollow sphere, SnO2@C and Sn@C products. The effective absorption frequency width was up to 7.1 GHz with a matched thickness of 1.5 mm. The excellent electromagnetic absorption mechanism was attributed to the balanced impedance matching and attenuation ability. Besides, the existed Sn/SnO2 interface plays a key role on the attenuation intensity since the boosted interface polarization intensity.
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