纳米石墨/铁氧体复合吸收剂制备和性能研究  

Research on Preparation and Performance of Nano-Graphite/Ferrite Composite Absorbent

作　　者：张晶[1] Zhang Jing(School of Ceramic,Wuxi Vocational Institute of Arts&Technology,Yixing,Jiangsu 214206)

机构地区：[1]无锡工艺职业技术学院陶瓷学院,江苏宜兴214206

出　　处：《非金属矿》2023年第4期72-75,80,共5页Non-Metallic Mines

基　　金：江苏省高等学校自然科学研究面上项目(20KJB430028);2021年江苏高校“青蓝工程”。

摘　　要：本试验采用机械共混法制备纳米石墨包覆BaZn_(2)Fe_(16)O_(27)复合吸收剂。通过X射线衍射(XRD)、扫描电镜(SEM)等测试手段分析表征复合粉体物相组成、微观形貌,通过网络分析仪测试分析复合粉体的电磁参数,结合YRComputer软件模拟计算复合粉体的反射损耗。结果表明,纳米石墨均匀地包覆在六方片状铁氧体表面;复合粉体具有介电损耗和磁损耗的双重损耗机制。纳米石墨与W型BaZn_(2)Fe_(16)O_(27)复合,有效改善了阻抗匹配条件,拓宽了波吸收带。当纳米石墨含量为8%时,涂层厚度为2 mm的纳米石墨包覆铁氧体复合吸收剂涂层的反射损耗在14.4 GHz左右达到最大值-47 dB,并且小于-10 dB的带宽达到7 GHz(9.5~16.5 GHz),基本覆盖了X和Ku波段。Nano-graphite coated BaZn_(2)Fe_(16)O_(27) composite absorbent was prepared by mechanical blending method.The phase and microstructure of the composite powders were analyzed by using XRD,SEM.The vector network analyzer was used to test the electromagnetic performance of the composite absorbent,and the reflection loss of the composite powders was simulated by YRComputer software.Morphological analysis showed the nano-graphite was uniformly coated on the surface of hexagonal flake ferrite.The sample had a dual loss mechanism of dielectric and magnetic loss.The combination of nano-graphite and W-type BaZn_(2)Fe_(16)O_(27) effectively improved the impedance matching condition and broadens the wave absorption band.When nano-graphite content reached 8%,the thickness of coating was 2 mm,the reflection loss reached the maximum-47 dB at about 14.4 GHz,and the absorption bandwidth reached 7 GHz(9.5-16.5 GHz)when RL was-10 dB,which basically covered the X-band and Ku-band.

关 键 词：吸波材料 铁氧体 纳米石墨 复合 

分 类 号：TB34[一般工业技术—材料科学与工程]