(沈陽理工大學 材料科學與工程學院，沈陽 110159)
摘 要: 采用超聲場下原位聚合法制備鎳鐵氧體/聚苯胺復合材料，并采用X射線衍射儀(XRD)和HP8510網(wǎng)絡分析儀研究其結構和電磁性能。結果表明：十二烷基苯磺酸(DBSA)摻雜后的聚苯胺是部分結晶的，鎳鐵氧體與聚苯胺分子鏈之間存在某些相互作用；與聚苯胺相比，鎳鐵氧體/聚苯胺復合材料的介電損耗角正切值tanδε與磁損耗角正切值tanδm都增大；鎳鐵氧體含量為5%和15%(質量分數(shù))的復合材料分別具有最大的tanδε值和最大的tanδm值；鎳鐵氧體含量為15%的試樣在8~18 GHz范圍內(nèi)綜合吸波性能最好，具有最大衰減−23.4 dB，−8 dB帶寬為5.73 GHz。
關鍵字: 鎳鐵氧體；聚苯胺；電磁性能；反射損耗
（School of Materials Science and Engineering, Shenyangligong University, Shenyang 110159, China）
Abstract:The nickel ferrite/ polyaniline composites were prepared by in-situ polymerization method under the ultrasonic field. The structural characteristics and electromagnetic properties of the composites were analyzed by X-ray diffractometry (XRD) and HP8510 network analyzer, respectively. The results indicate that DBSA doped polyaniline has some degree of crystallinity. There is some interaction between the nickel ferrite particles and the polyaniline chains. The dielectric loss tangent tanδε and magnetic tanδm loss tangent of the nickel ferrite/polyaniline composites are higher than those of polyaniline. The composites with ferrite content of 5% and 15% (mass fraction) have the maximum tanδε and tanδm values, respectively. The composite with ferrite content of 15% shows better electromagnetic wave absorbing property with minimum reflection loss of −23.4 dB, and the bandwidth of −8 dB is 5.73 GHz.
Key words: nickel ferrite; polyaniline; electromagnetic properties; reflection loss
