Atomic-Scale Layer-by-Layer Deposition of FeSiAl@ZnO@Al2O3 Hybrid with Threshold Anti-Corrosion and Ultra-High Microwave Absorption Properties in Low-Frequency Bands

被引:157
作者
Tian, Wei [2 ]
Li, Jinyao [1 ,3 ]
Liu, Yifan [3 ]
Ali, Rashad [3 ]
Guo, Yang [4 ]
Deng, Longjiang [1 ]
Mahmood, Nasir [5 ]
Jian, Xian [1 ,2 ,3 ]
机构
[1] Univ Elect Sci & Technol China, Sch Elect Sci & Engn,Natl Engn Researching Ctr El, State Key Lab Elect Thin Films & Integrated Devic, Key Lab Multispectral Absorbing Mat & Struct,Mini, Chengdu 611731, Peoples R China
[2] Huzhou Univ Elect Sci & Technol China, Yangtze Delta Reg Inst, Sch Elect Sci & Engn, Huzhou 313001, Peoples R China
[3] Univ Elect Sci & Technol China, Sch Mat & Energy, Chengdu 611731, Peoples R China
[4] Panzhihua Univ, Sch Elect & Informat Engn, Panzhihua 617000, Peoples R China
[5] RMIT Univ, Sch Engn, Melbourne, Vic 3001, Australia
基金
中国国家自然科学基金;
关键词
Atomic layer deposition; Magnetic alloy; Dual-oxide-shells; Microwave absorption; Anti-corrosion; CORROSION PROTECTION; MAGNETIC-PROPERTIES; CARBON NANOCOILS; OXYGEN VACANCY; GRAPHENE; PERFORMANCE; COMPOSITES; AL2O3; NANOPARTICLES; LIGHTWEIGHT;
D O I
10.1007/s40820-021-00678-4
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Developing highly efficient magnetic microwave absorbers (MAs) is crucial, and yet challenging for anti-corrosion properties in extremely humid and salt-induced foggy environments. Herein, a dual-oxide shell of ZnO/Al2O3 as a robust barrier to FeSiAl core is introduced to mitigate corrosion resistance. The FeSiAl@ZnO@Al2O3 layer by layer hybrid structure is realized with atomic-scale precision through the atomic layer deposition technique. Owing to the unique hybrid structure, the FeSiAl@ZnO@Al2O3 exhibits record-high microwave absorbing performance in low-frequency bands covering L and S bands with a minimum reflection loss (RLmin) of -50.6 dB at 3.4 GHz. Compared with pure FeSiAl (RLmin of -13.5 dB, a bandwidth of 0.5 GHz), the RLmin value and effective bandwidth of this designed novel absorber increased up to similar to 3.7 and similar to 3 times, respectively. Furthermore, the inert ceramic dual-shells have improved 9.0 times the anti-corrosion property of FeSiAl core by multistage barriers towards corrosive medium and obstruction of the electric circuit. This is attributed to the large charge transfer resistance, increased impedance modulus |Z|(0.01 Hz), and frequency time constant of FeSiAl@ZnO@Al2O3. The research demonstrates a promising platform toward the design of next-generation MAs with improved anti-corrosion properties.
引用
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页数:14
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