有机氟包覆片状FeSiAl吸收剂及其吸波性能

doi:10.11896/cldb.21030255

材料导报

2022, Vol. 36

Issue (9): 21030255-6 https://doi.org/10.11896/cldb.21030255

无机非金属及其复合材料

有机氟包覆片状FeSiAl吸收剂及其吸波性能

陈亮¹, 陈少文¹, 袁振亮¹, 李启凡¹, 马会茹², 陈志宏³, 李维^1,*, 官建国¹

1 武汉理工大学材料复合新技术国家重点实验室,武汉 430070
2 武汉理工大学化学化工与生命科学学院,武汉 430070
3 武汉理工大学理学院,武汉 430070

Grafting of Organic Fluorine on the Surface of Flaky FeSiAl Particles and Its Microwave Absorption Property

CHEN Liang¹, CHEN Shaowen¹, YUAN Zhenliang¹, LI Qifan¹, MA Huiru², CHEN Zhihong³, LI Wei^1,*, GUAN Jianguo¹

1 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
2 School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
3 College of Science, Wuhan University of Technology, Wuhan 430070, China

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摘要以十三氟辛基三乙氧基硅烷(FAS)为硅源,采用水解缩合法对片状FeSiAl吸收剂粒子进行表面接枝包覆,对片状FeSiAl粒子表面包覆前后的微观结构、包覆层成分、静磁性能和电磁性能进行了表征。结果表明:FAS成功地接枝在片状FeSiAl粒子表面形成薄层致密包覆层,包覆后的粒子仍保持较好的软磁性能。由于包覆层的电绝缘及低极化特性,吸收剂的介电常数可降低40%,而磁导率不受影响,从而使材料的阻抗匹配显著提升。当FAS的质量分数为3%,吸收剂的填充质量分数为76%的复合材料是3 mm厚度时,其反射损耗RL小于-3 dB时的吸收带宽从1.206 GHz (0.147~1.353 GHz)增加到1.922 GHz (0.147~2.069 GHz),最小损耗强度从-14.64 dB提升至-16.90 dB。

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	陈亮
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	李启凡
	马会茹
	陈志宏
	李维
	官建国

关键词: 有机氟包覆片状吸收剂复介电常数阻抗匹配吸波性能

Abstract: Triethoxy-1H,1H,2H,2H-tridecafluoro-n-octylsilane (FAS) was proposed to be grafted on the surface of flaky FeSiAl absorbents by a hydroly-tic condensation method. The microstructure, coating composition, static magnetic and electromagnetic properties of flaky FeSiAl absorbents before and after surface coating were characterized. The results showed that the hydrolyzed FAS were successfully grafted on the surface of flaky FeSiAl particles to form a thin and uniform coating, and coated particles still have good soft magnetic properties. Due to the electrical insulation and low polarization properties of the coated layer, the complex permeability of flaky FeSiAl absorbents was nearly unchanged by the coating while complex permittivity was reduced by 40%, which substantially improved the impedance matching of the microwave absorbing materials.When the composite material with a mass fraction of 3% FAS and a mass fraction of absorbent filler of 76% was 3 mm thick, the absorption bandwidth whose reflection loss RL was less than -3 dB increased from 1.206 GHz (0.147—1.353 GHz) to 1.922 GHz (0.147—2.069 GHz), the minimum loss intensity increased from -14.64 dB to -16.90 dB.

Key words: organic fluorine coating flaky absorbents complex permittivity impedance matching microwave absorbing materials

出版日期: 2022-05-10 发布日期: 2022-05-09

ZTFLH:

TB34

基金资助: 国家自然科学基金(51577138)

通讯作者: wellee@whut.edu.cn

作者简介: 陈亮,2017年6月毕业于西华大学,获得工学学士学位,现为武汉理工大学材料科学与工程专业硕士研究生,硕士期间研究方向为吸波材料。
李维,研究员,博士研究生导师。2004年在武汉理工大学获得学士学位。2011年在武汉理工大学获得博士学位并继续从事博士后研究工作,期间赴美国Purdue University访问交流,现于材料复合新技术国家重点实验室从事研究工作。主要从事电磁功能材料研究。目前已在Advanced Materials、Advanced Optical Materials、Applied Physics Letters等期刊发表论文30余篇,主持多项国家自然科学基金项目。2016年入选武汉理工大学15551人才工程青年拔尖人才(第二层次)。

引用本文:

陈亮, 陈少文, 袁振亮, 李启凡, 马会茹, 陈志宏, 李维, 官建国. 有机氟包覆片状FeSiAl吸收剂及其吸波性能[J]. 材料导报, 2022, 36(9): 21030255-6.
CHEN Liang, CHEN Shaowen, YUAN Zhenliang, LI Qifan, MA Huiru, CHEN Zhihong, LI Wei, GUAN Jianguo. Grafting of Organic Fluorine on the Surface of Flaky FeSiAl Particles and Its Microwave Absorption Property. Materials Reports, 2022, 36(9): 21030255-6.

链接本文:

http://www.mater-rep.com/CN/10.11896/cldb.21030255 或 http://www.mater-rep.com/CN/Y2022/V36/I9/21030255

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