Effect of deposition temperature on SrFe12O19@carbonyl iron core-shell composites as high-performance microwave absorbers

doi:10.1088/1674-1056/ab81fb

中国物理B ›› 2020, Vol. 29 ›› Issue (6): 67701-067701.doi: 10.1088/1674-1056/ab81fb

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Effect of deposition temperature on SrFe₁₂O₁₉@carbonyl iron core-shell composites as high-performance microwave absorbers

Yuan Liu(刘渊), Rong Li(李茸), Ying Jia(贾瑛), Zhen-Xin He(何祯鑫)

Xi'an Research Institute of High Technology, Xi'an 710025, China

收稿日期:2019-12-16 修回日期:2020-02-24 出版日期:2020-06-05 发布日期:2020-06-05
通讯作者: Yuan Liu E-mail:liuyuanbixue@163.com

Effect of deposition temperature on SrFe₁₂O₁₉@carbonyl iron core-shell composites as high-performance microwave absorbers

Yuan Liu(刘渊), Rong Li(李茸), Ying Jia(贾瑛), Zhen-Xin He(何祯鑫)

Xi'an Research Institute of High Technology, Xi'an 710025, China

Received:2019-12-16 Revised:2020-02-24 Online:2020-06-05 Published:2020-06-05
Contact: Yuan Liu E-mail:liuyuanbixue@163.com

摘要/Abstract

摘要： The SrFe₁₂O₁₉@carbonyl iron (CI) core-shell composites used in microwave absorption are prepared by the metal-organic chemical vapor deposition (MOCVD). The x-ray diffractometer, scanning electron microscope, energy dispersive spectrometer, and vector network analyzer are used to characterize the structural, electromagnetic, and absorption properties of the composites. The results show that the SrFe₁₂O₁₉@CI composites with a core-shell structure could be successfully prepared under the condition: deposition temperatures above 180 ℃, deposition time 30 min, and gas flow rate 30 mL/min. The electromagnetic properties of the composites change significantly, and their absorption capacities are improved. Of the obtained samples, those samples prepared at a deposition temperature of 180 ℃ exhibit the best absorption performance. The reflection loss of SrFe₁₂O₁₉@CI (180 ℃) with 1.5 mm-2.5 mm in thickness is less than -10 dB in a frequency range of 8 GHz-18 GHz, which covers the whole X band and Ku band.

关键词: SrFe₁₂O₁₉, carbonyl iron, electromagnetic properties, microwave absorption

Abstract: The SrFe₁₂O₁₉@carbonyl iron (CI) core-shell composites used in microwave absorption are prepared by the metal-organic chemical vapor deposition (MOCVD). The x-ray diffractometer, scanning electron microscope, energy dispersive spectrometer, and vector network analyzer are used to characterize the structural, electromagnetic, and absorption properties of the composites. The results show that the SrFe₁₂O₁₉@CI composites with a core-shell structure could be successfully prepared under the condition: deposition temperatures above 180 ℃, deposition time 30 min, and gas flow rate 30 mL/min. The electromagnetic properties of the composites change significantly, and their absorption capacities are improved. Of the obtained samples, those samples prepared at a deposition temperature of 180 ℃ exhibit the best absorption performance. The reflection loss of SrFe₁₂O₁₉@CI (180 ℃) with 1.5 mm-2.5 mm in thickness is less than -10 dB in a frequency range of 8 GHz-18 GHz, which covers the whole X band and Ku band.

Key words: SrFe₁₂O₁₉, carbonyl iron, electromagnetic properties, microwave absorption

中图分类号: (Composite materials)

77.84.Lf

78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)) 62.20.mm (Fracture) 81.05.Lg (Polymers and plastics; rubber; synthetic and natural fibers; organometallic and organic materials)

刘渊, 李茸, 贾瑛, 何祯鑫. Effect of deposition temperature on SrFe₁₂O₁₉@carbonyl iron core-shell composites as high-performance microwave absorbers[J]. 中国物理B, 2020, 29(6): 67701-067701.

Yuan Liu(刘渊), Rong Li(李茸), Ying Jia(贾瑛), Zhen-Xin He(何祯鑫). Effect of deposition temperature on SrFe₁₂O₁₉@carbonyl iron core-shell composites as high-performance microwave absorbers[J]. Chin. Phys. B, 2020, 29(6): 67701-067701.

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Effect of deposition temperature on SrFe₁₂O₁₉@carbonyl iron core-shell composites as high-performance microwave absorbers

Effect of deposition temperature on SrFe₁₂O₁₉@carbonyl iron core-shell composites as high-performance microwave absorbers

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