多孔软硬磁Ni_(0.5)Zn_(0.5)Fe_2O_4/SrFe_(12)O_(19)复合纤维制备及吸波性能  

Preparation and Microwave Absorption Properties of Porous Structure Soft/Hard Magnetic Ni_(0.5)Zn_(0.5)Fe_2O_4/SrFe_(12)O_(19) Composite Fibers

作　　者：周建伟 邢晓桐 韩秋霞 孟献丰[1,2] 陆春华 ZHOUJian-Wei;XING Xiao-Tong;HAN Qiu-Xi;MENGXian-Feng;LU Chun-Hua(School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China;Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing 210009, Chin)

机构地区：[1]江苏大学材料科学与工程学院,镇江212013 [2]江苏先进无机功能复合材料协同创新中心,南京210009

出　　处：《无机化学学报》2018年第6期1043-1050,共8页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.50674048);江苏省六大人才高峰(No.XCL-15);江苏省自然科学基金(No.BK20141300)项目资助

摘　　要：通过静电纺丝技术制备了多孔软硬磁Ni_(0.5)Zn_(0.5)Fe_2O_4/SrFe_(12)O_(19)复合纤维,利用综合热重分析仪(TG-DSC)、X射线衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线能谱仪(EDS)和矢量网络分析仪(VNA)等对复合纤维的晶体结构、微观形貌和电磁性能进行了表征,研究了不同软硬磁质量比对纤维结构和性能的影响。结果表明:900℃下制备的复合纤维具有立体多孔结构,软硬磁质量比为1∶3时,复合纤维的比表面积达到55 m^2·g^(-1)。吸波性能测试结果显示,当吸波剂涂层厚度为3.5 mm时,复合纤维在10.6 GHz处反射损失(RL)值达到-31.9 dB,在2~18 GHz频率范围内,RL值小于-10 dB的吸收带宽达到10.5 GHz,覆盖了整个X波段(8.2~12.4 GHz)和Ku波段(12.4~18 GHz),显示出优异的宽波段吸收性能。Soft/hard magnetic Ni0.5Zn0.5Fe2O4/SrFe12O19 composite fibers with porous structure are prepared using a combination of sol-gel and electrospinning method. The crystal structure, micromorphology and electromagnetic properties of the as-prepared composite fibers are characterized by thermogravimetric analyzer（TG-DSC）, X-ray diffraction（XRD）, scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, energy-dispersive X-ray spectrometry（EDS）, N2 adsorpation-desorpation and vector network analyzer（VNA）. The results indicate that after being heat treatment at 900 ℃, the obtained composite fibers are of three-dimensional porous structure. When the mass ratio of soft phase/hard phase is 1∶3, the composite fiber has a large surface area value（55 m2·g-1）. The microwave absorption properties results demonstrate that when the coating layer thickness is 3.5 mm, the composite fiber has a minimum reflection loss（RL） value（-31.9 dB）. At the same time, the bandwidth of the RLvalues less than-10 dB in the frequency range of 2-18 GHz reaches 10.5 GHz, which covers all X-band（8.2-12.4 GHz） and Ku-band（12.4-18 GHz） and shows excellent wide band microwave absorption performance.

关 键 词：Ni0.5Zn0.5Fe2O4/SrFe12O19 静电纺丝法 软硬磁复合 纤维 吸波性能 

分 类 号：O614[理学—无机化学] TQ343.41[理学—化学]