铜锌离子取代比对Cu_(x)Zn_(2-x)FeO_(4)/MWCNT复合材料吸波性能的影响  

Influence of copper-zinc ion substitution ratio on microwave-absorbing properties of Cu_(x)Zn_(2-x)FeO_(4)/MWCNT composites

作　　者：王业宝 荆云娟 张欢 董经经 王文均 王嘉宁 WANG Yebao;JING Yunjuan;ZHANG Huan;DONG Jingjing;WANG Wenjun;WANG Jianing(Shaanxi Yuanfeng New Material Technology Co.,Ltd.,Xi′an 710025)

机构地区：[1]陕西元丰新材料科技有限公司,陕西西安710025

出　　处：《合成纤维工业》2025年第2期24-31,共8页China Synthetic Fiber Industry

基　　金：陕西省基金项目(2023KXJ-130)。

摘　　要：以铜离子(Cu^(2+))、锌离子(Zn^(2+))为取代离子,尖晶石铁氧体(M-Fe_(x)O_(y))为载体,采用一步水热法合成了铜锌铁氧体(Cu_(x)Zn_(2-x)FeO_(4))/羟基化多壁碳纳米管(MWCNT-OH)(x分别为0.25、0.5、1)复合吸波剂,研究了复合吸波剂的表面形貌、晶体结构、电磁性能和吸波性能,并考察了有效吸波带宽(E_(AB))最宽的Cu_(0.5)Zn_(1.5)FeO_(4)/MWCNT-OH复合吸波剂涂层尼龙平纹织物的吸波性能。结果表明:MWCNT-OH的引入增加了Cu_(x)Zn_(2-x)FeO_(4)的粗糙度,有利于电磁波在Cu_(x)Zn_(2-x)FeO_(4)表面产生多次散射和折射;Cu_(x)Zn_(2-x)FeO_(4)/MWCNT-OH复合吸波剂的磁化强度随Cu^(2+)/Zn^(2+)取代比(摩尔比)的增大而降低,但整体偏小,小于1.5 A·m^(2)/kg;相比于Fe_(3)O_(4)/MWCNT-OH,采用金属离子取代的方式合成的Cu_(x)Zn_(2-x)FeO_(4)/MWCNT-OH复合吸波剂的电磁波衰减性能更强,当复合吸波剂的Cu^(2+)/Zn^(2+)取代比为0.50.5,在匹配厚度为6 mm,频率为8.96 GHz时,其最小反射损耗(R_(Lmin))为-20.24 dB,E_(AB)达10.82 GHz;Cu_(0.5)Zn_(1.5)FeO_(4)/MWCNT-OH复合吸波剂涂层织物的E_(AB)随着涂层织物厚度的增加而增大,涂层织物厚度为4.5 mm时E_(AB)最大,为10.05 GHz。Using copper ions(Cu^(2+))and zinc ions(Zn^(2+))as substituted ions and spinel ferrite(M-Fe_(x)O_(y))as the carrier,copper-zinc ferrite(Cu_(x)Zn_(2-x)FeO_(4))/hydroxylated multi-walled carbon nanotubes(MWCNT-OH)(x is 0.25,0.5,and 1 respectively)composite microwave absorbing agents were synthesized by one-step hydrothermal method.The surface morphology,crystal structure,electromagnetic properties,and microwave absorbing properties of the composite microwave absorbing agents were studied.Moreover,the microwave absorbing properties of nylon plain-weave fabric coated with Cu_(0.5)Zn_(1.5)FeO_(4)/MWCNT-OH composite microwave absorbing agent,which had the widest effective microwave absorbing bandwidth(E_(AB)),were investigated.The results showed that the introduction of MWCNT-OH increased the roughness of Cu_(x)Zn_(2-x)FeO_(4),which was beneficial for the multiple scattering and refraction of electromagnetic waves on the surface of Cu_(x)Zn_(2-x)FeO_(4);the magnetization intensity of Cu_(x)Zn_(2-x)FeO_(4)/MWCNT-OH composite microwave absorbing agents decreased with the increase of Cu^(2+)/Zn^(2+)substitution ratio(molar ratio),and the overall value was relatively low,lower than 1.5 A·m^(2)/kg;compared with Fe_(3)O_(4)/MWCNT-OH,the Cu_(x)Zn_(2-x)FeO_(4)/MWCNT-OH composite microwave absorbing agent synthesized by the substitution of metal ions had stronger electromagnetic wave attenuation performance,the minimum reflection loss(R_(Lmin))of the composite microwave absorbing agent was-20.24 dB,and the E_(AB)reached 10.82 GHz when the substitution ratio of Cu^(2+)/Zn^(2+)was 0.50.5 at a matching thickness of 6 mm and a frequency of 8.96 GHz;the E_(AB)of the fabric coated with Cu_(0.5)Zn_(1.5)FeO_(4)/MWCNT-OH composite microwave absorbing agent increased with the increase of coating thickness,the E_(AB)was maximally 10.05 GHz when the coating thickness was 4.5 mm.

关 键 词：尖晶石铁氧体 羟基化多壁碳纳米管 复合吸波剂 吸波性能 涂层织物 有效吸波带宽 

分 类 号：TB332[一般工业技术—材料科学与工程]