不同表面处理剂对M型掺杂锶铁氧体(SiLa_xFe_(12-x)O_(19)(x=0.5))/聚吡咯(PPy)的吸波性能影响分析  

Analysis of Wave Absorbing Performance of M-type SiLa_xFe_(12-x)O_(19)(x=0.5)/PPy Synthesized by Different Surfactants

作　　者：康永[1] 黄英[1] 

机构地区：[1]西北工业大学理学院,西安710072

出　　处：《材料导报》2014年第24期1-4,13,共5页Materials Reports

基　　金：航天科技创新基金(NBXT0002);航天支撑技术基金(NBXW0001)

摘　　要：采用溶胶-凝胶法及脱脂棉作为模板制得絮状掺杂锶铁氧体（SiLax Fe12-xO19 （x=0.5））,通过引入不同种类表面活性剂,制备出M型掺杂锶铁氧体（SiLax Fe12-xO19（x=0.5））/聚吡咯（PPy）复合吸波材料.结果表明：采用表面活性剂十二烷基苯磺酸钠（C18H29NaO3S）合成的吸波材料的饱和磁化强度（emu/g）、矫顽力（Oe）及剩余磁化强度（emu/g）要高于使用阳离子表面活性剂.γ-甲基丙烯酰氧基丙基三甲氧基硅烷（KH-570）合成的吸波材料磁化性能明显优于阴/阳离子表面活性剂,但阴/阳离子表面活性剂磁损耗比较高.最佳频率匹配范围为800～1000MHz.Nano-particles of flocculent SiLaxFe12 xO19 （x=0.5） were prepared by sol-gel method using degreasing cotton as exotemplate,and M-type SiLax Fe12-x O19 （x=0.5）/PPy absorbing materials were synthesized via the introduction of different types of surfactants.It was found the saturation magnetization,coercivity and remanent magnetization of absorbing materials synthesized by using sodium dodecyl benzene sulfonate were higher than cationic surfactants.Although magnetic properties of absorbing materials synthesized by using KH-570 were much better than anionic/cationic surfactant,magnetic loss of anionic/cationic surfactant was high.The optimum matching frequency range was 800-1000 MHz.

关 键 词：表面活性剂 磁化强度 矫顽力 电导率 

分 类 号：O634[理学—高分子化学]