复合纳米纤维静电纺丝法的制备及其磁性

以聚乙烯吡咯烷酮（PVP）和金属盐为原料,利用静电纺丝法成功制备出了摩尔比为1：1的SrTiO3-SrFe12O19磁电复合纳米纤维。并通过FT-IR,XRD,SEM和VSM等技术对纤维前驱体及其产物的结构、热处理产物的物相、形貌及磁性能进行了表征。结果表明,样品经900℃焙烧2h后,即可得到纯的SrTiO3和SrFe...

Fabrication and Magnetic Property of Composite Nanofibers by Electrospinning

SrTiO3/SrFe12O19 nanofibers with a molar ratio of 1:1 and an average diameter about 120 nm were prepared by electrospinning.Effects of calcination temperature on the formation,crystallite size,morphology and magnetic property were studied by using infrared spectroscopy,X-ray diffractometry,scanning electron microscopy and vibrating sample magnetometry.Strontium ferrite and titanate are formed after being calcined at 900 ℃ for 2 hours and the composite nanofibers are fabricated from nanograins of SrTiO3 about 24 nm and SrFe12O19 around 33 nm.Crystallite sizes for the nanofibers increase with increasing calcination temperature,and the addition of SrTiO3 has an obvious suppression effect on SrFe12O19 grain growth.Saturation magnetization and remanence tend to increase with increasing the crystallite size.With the increase of calcination temperature from 900 to 1050℃,the coercivity increases initially,achieves a maximum value of 520.2 kA m-1 at 950 ℃,and then shows a reduction tendency.