静电纺丝技术制备BaFe_(12)O_(19)纳米纤维与表征

Synthesis and Characterization of BaFe_(12)O_(19) Nanofibres Via an Electrospinning Technique

采用静电纺丝技术制备了PVP/[BaCl2+Fe(NO3)3]复合纳米纤维,将其进行热处理,获得了单相BaFe12O19纳米纤维。差热-热重分析(TG-DTA)表明,当焙烧温度高于450℃时,PVP/[BaCl2+Fe(NO3)3]复合纳米纤维中溶剂、有机物和无机盐分解挥发完毕,样品不再失重,总失重率为90.5%.X射线衍射分析(XRD)与傅里叶转换红外光谱分析(FTIR)表明,PVP/[BaCl2+Fe(NO3)3]复合纳米纤维为非晶态,经900℃焙烧5h后,获得了单相磁铅石型的BaFe12O19纳米纤维。经扫瞄式电子显微镜(SEM)分析表明,经过900℃焙烧后,获得了直径约80 nm的BaFe12O19纳米纤维,长度大于200μm.对BaFe12O19纳米纤维的形成机理进行了讨论,该技术可以用来制备其他铁氧体纳米纤维。

PVP/[BaCl2＋Fe（NO3）3] composite fibers were synthesized by electrospinning,BaFe12O19 nanofibers were fabricated by calcinating of the prepared composite nanofibers.Thermogravimetric-differential thermal analyzer（TG-DTA）analysis revealed that the water,organic compounds and inorganic salts in the PVP/[BaCl2＋Fe（NO3）3] composite nanofibers were decomposed and volatilized totally,and the weight of the sample kept constant when sintering temperature was above 450 ℃,and the total weight loss percentage was 90.5%.X-ray diffraction（XRD）and Fourier transform infrared spectroscopy（FTIR）results showed that PVP/[BaCl2＋Fe（NO3）3] composite nanofibers were amorphous in structure,and pure phase BaFe12O19 nanofibers were obtained by calcinating of the PVP/[BaCl2＋Fe（NO3）3] composite fibers at 900 ℃ for 5 h.Scanning electron microscope（SEM）analysis indicated that the diameter of the prepared BaFe12O19 nanofibers was about 80nm,and its length was greater than 200 μm.The formation mechanism of the BaFe12O19 nanofibers was preliminarily discussed.This method can be applied to the preparation of other ferrite material nanofibers.