摘要
通过凝胶自蔓延燃烧制备BaFe(12-x)CexO19(x=0,0.03,0.05)铁氧体,以过硫酸铵为氧化剂,在氯仿溶液中通过原位溶液聚合反应制备了铈掺杂钡铁氧体-聚噻吩复合材料。X射线衍射分析揭示了铈含量的变化对铁氧体结晶性有一定影响;红外光谱揭示了聚噻吩分子链与铁氧体纳米粒子之间存在作用力;透射电镜表明复合物中铁氧体纳米粒子被聚合物所包覆,呈现核壳结构;磁滞回线表明铈含量对钡铁氧体磁饱和强度和磁剩余强度有影响,随着铈含量增加,钡铁氧体磁饱和强度依次为1.53645emu·g-1、4.32204emu·g-1和2.57125emu·g-1,磁剩余强度为1.06432emu·g-1、2.52412emu·g-1和1.59537emu·g-1;复合材料磁性低于铈掺杂钡铁氧体,75%聚噻吩/BaFe11.95Ce0.03O19磁饱和强度和磁剩余强度分别为1.53645emu·g-1和1.06432emu·g-1。
Ce-doped barium ferriteBaFe（12-x）CexO19（x=0,0.03,0.05） ferrite was obtained by sol-gel self- propagating high temperature synthesis. BaFe（12 -x） CexO19-polythiophene（PTH） composites had been successfully synthesized byin situ polymerization with ammonium persulphate （（NH4）2 S2O8 ） as an initiator in trichloromethane. The results of XRD indicated that the content of Ce3＋ had influence on barium ferrite crystal structure. FTIR spectra demonstrated that there were interactions between ferrite particles and PTh. TEM study showed that the composites presented the core-shell structure. Under applied magnetic field, the saturation magnetization（Ms）and remanent magnetization （Mr） of BaFe（12-x） CexO19 varied with the Ce3＋ content. The value of Ms is 1. 53645 emu·g-1,4. 32204 emu·g-1 and 2. 57125 emu·g-1 and the value of Mr is 1. 06432 emu·g-1 ,2. 52412emu·g-1 and 1. 59537emu·g-1. The magnetic performance of composites was lower than that of BaFe（12-x） CexO19, and its Ms and Mr are 1. 53645emu·g-1 and 1. 06432emu·g-1 respectively.
关键词
钡铁氧体
铈掺杂
聚噻吩
原位聚合
Ba ferrite, Ce-doped, polythiophene, in-situ polymerization
