摘要
采用静电纺丝技术制备了PVP/[Co(NO3)3+Ni(CH3COO)2+Fe(NO3)3]复合纤维,通过X射线衍射(XRD)、扫描电镜(SEM)和振动样品磁强计(VSM)对复合纤维及其焙烧产物进行了表征,较为系统地考察了制备参数,如PVP含量、醇/水比例、电场强度以及无机盐含量对复合纤维形貌和直径的影响,获得了最佳制备条件。将所得复合纤维在550℃焙烧2h可以制得单相尖晶石结构的晶态Co0.5Ni0.5Fe2O4纳米纤维,其平均直径约为80nm,在室温下具有良好的磁性,比饱和磁化强度和矫顽力分别为52.3A.m2/kg和81.0kA/m。
PVP/[Co（NO3 ）3 ＋Ni（CH3COO）2 ＋Fe（NO3 ）s] composite fibers were fabricated by an electrospin- ning technique. The composite fibers and calcination products were characterized by means of X-ray diffraction （XRD）, scanning electron microscope （SEM） and vibrating sample magnetometer （VSM）. The influences of preparation parameters such as PVP concentration, ethanol to water ration in the solvent, electric field strength and inorganic salt concentration on the morphology and diameter of the composite fibers were systematically investigated, and the optimun preparation conditions were obtained. Crystalline Co0.5Ni0.5Fe2O4 nanofibers with a single-phase spinel structure were synthesized by calcination of electrospun composite fibers at 500 ℃ for 2 h and the average fiber diameter is about 80nm. The prepared Co0.5Ni0.5Fe2O4 nanofibers exhibit good magnetic properties at room temperature and their specific saturation magnetization and coercivity are 52.3 A@ m2/kg and 81.0 kA/m, respectively.
出处
《实验技术与管理》
CAS
北大核心
2012年第5期38-42,48,共6页
Experimental Technology and Management
基金
江苏省高校自然科学研究项目(11KJB430006)
江苏省青蓝工程项目
