【摘要】 介绍了用静电纺丝法制备钇铁石榴石(YIG)磁光单晶纳米纤维材料的研究工作,其主要制备方法是将合成YIG所需金属元素的醇盐溶解于有机溶剂,通过静电纺丝法制备出了复合超细纤维,然后进行热处理,得到晶态磁光纳米纤维。对制备的复合纤维和热处理后的磁光纤维作了扫描电镜(SEM)分析,对热处理后的纤维作为了透射电镜(TEM)和X射线衍射(XRD)测试。通过对测试结果的分析发现,在纺丝过程中微量注射泵的推进速度和空气相对湿度是主要影响因素,推进速度和相对湿度减小,都有利于成丝。复合纤维的直径在500 nm~1 000 nm之间,经过750℃热处理后,样品仍然能保持纤维状结构,纤维直径在100 nm左右,并能够合成出单晶钇铁石榴石相。更多还原

【Abstract】 A method for preparing crystalline magnetic yttrium iron garnet nanofibers was presented.In this procedure,metallic organic compounds containing iron and yttrium ions were dissolved in organic solvents,which were subsequently electrospun to form composite fibers and were calcinated into crystalline yttrium iron garnet nanofibers at 750 ℃.The measurements were performed by Scanning Electron Microscope(SEM),Tunnel Electron Microscope(TEM) and X-ray Diffraction(XRD). The results show that the addition rate of solutions and the environmental humidity are major factors influencing the fiber characterizations.The diameters of the composite fibers are between 500 nm～1 000 nm,whereas after post-annealing,they decreased to about 100 nm,and the yttrium iron garnet single crystalline phase is obtained.更多还原