片状微纳米还原铁粉的制备及其吸波性能  

Preparation and microwave absorbing properties of flake micro nano reduced iron powder

作　　者：郭海伟 郑松 任熙华 张玉芳 栗鹏飞 冯雅珊 GUO Haiwei;ZHENG Song;REN Xihua;ZHANG Yufang;LI Pengfei;FENG Yashan(Zhengzhou Key Laboratory of Advanced Functional Materials,Zhengzhou 450000,China;School of Ocean Engineering,Harbin Institute of Technology at Weihai,Weihai 264209,China)

机构地区：[1]郑州市先进功能材料重点实验室,河南郑州450000 [2]哈尔滨工业大学(威海)海洋工程学院,山东威海264209

出　　处：《粉末冶金工业》2024年第5期95-99,共5页Powder Metallurgy Industry

基　　金：河南省科技攻关项目(232102231011);河南省科技攻关项目(222102230025);河南省教育厅高等学校重点科研项目(23B430016)

摘　　要：以400目的球状还原铁粉为原料,采用直径2 mm的不锈钢磨球进行研磨,通过SEM扫描电镜和XRD表征微观形态,结果表明,经过球磨以后的还原铁粉组分没有变化,呈扁平片状结构,片层厚度大约为200 nm;采用矢量网络分析仪,通过弓形法测试其对应1.5 mm左右涂层在6~18 GHz的吸波性能,在12.15、14.95、11.95 GHz处最低反射率分别达到了-13.9、-15.4、-16.1 dB,有效吸波频段分别在9.6~14.2,9.4~16.3,9.1~14.5 GHz,带宽分别为4.6、6.9、5.4 GHz。随着涂层厚度的增加,吸波性能相应提高,吸波频段则向低频方向移动。The 400 mesh spherical reduced iron powder was used as raw material,and 2 mm diameter stainless steel grinding balls were used to grind it,and the micro-morphology was characterised by SEM and XRD.The results show that the components of the reduced iron powder are unchanged after ball milling,and it is a flat lamellar structure,with the thickness of the lamellar layer of about 200 nm.A vector network analyzer is used to test the wave absorbing performance of the coating corresponding to about 1.5 mm by the bowing method in the frequency range of 6~18 GHz.18 GHz,the lowest reflectance at 12.15,14.95 and 11.95 GHz reaches-13.9,-15.4 and-16.1 dB,respectively,and the effective wave-absorbing frequency bands are 9.6-14.2,9.4-16.3 and 9.1-14.5 GHz,with the bandwidths of 4.6,6.9 and 5.4 GHz,respectively.With the increase of the thickness,the wave-absorbing performance increases accordingly and the wave-absorbing band moves to the low-frequency direction.

关 键 词：微纳米 还原铁粉 吸波性能 湿法球磨 反射率 

分 类 号：TG141[一般工业技术—材料科学与工程]