无机材料学报2011，Vol.26Issue(8)：797-801,5.DOI:10.3724/SP.J.1077.2011.00797
静电纺丝法制备Sr1-xLaxFe12-xCoxO19纳米纤维及其磁性研究
Preparation and Magnetic Properties of Sr1-xLaxFe12-xCoxO19 Nanofibers by Electrospinning
摘要
Abstract
PVP/Sr1-xLaxFe12-xCoxO19(x=0-0.5) composite nanofiers were fabricated by Sol-Gel process and electrospinning technique. After high temperature calcination, Sr1-xLaxFe12-xCoxO19(x=0-0.5) ferrite nanofibers were successfully obtained. The morphology, phases, structure and magnetic properties of the nanofibers were characterized by Scanning electron microscope(SEM), Transmission electron microscope(TEM), X-ray diffraction(XRD) and Vibrating sample magnetometer(VSM). The results show that the samples have an uniform diameter of 80-150 nm after calcined at 800℃. The Sr1-xLaxFe12-xCoxO19(x=0-0.5) ferrite nanofiers all exhibit a hard magnetic performance, and chemical composition have considerable influence on magnetic properties of these ferrite nanofibers. The Sr1-xLaxFe12-xCoxO19(x=0-0.5) ferrite nanofiers exhibit M-type strontium ferrites, CoFe2O4 phase and LaFeO3 phase at x≥0.3. The substitutions of La3+ and Co2+ obviously increase the magnetic properties of the as-prepared samples at x≤0.l, the coercivity(Hc), saturation magnetization(Ms) and remanent magnetization(Mr) of Sr0.9La0.1Fe11.9Co0.1O19 nanofibers are 432.02 kA/m, 54.7 A·m2/kg, 28.9 A·m2/kg, respectively. The magnetic properties of the fibers increase significantly, compared with that of the Sr0.9La0.1Fe11.9Co0.1O19 powder samples.关键词
静电纺丝/M型SrFe12O19/La-Co取代/磁性能Key words
electrospinning/M-type strontium ferrites/La-Co substitution/magnetic properties分类
化学工程引用本文复制引用
李从举,张莲莲,王娇娜..静电纺丝法制备Sr1-xLaxFe12-xCoxO19纳米纤维及其磁性研究[J].无机材料学报,2011,26(8):797-801,5.基金项目
国家自然科学基金(51073005) （51073005）
北京市自然科学基金(2112013) （2112013）
北京市教委科技发展计划重点项目(KZ201010012012) （KZ201010012012）
北京市属高等学校人才强教深化计划(IHLB) （IHLB）
国家863项目(2007AA021906) （2007AA021906）
国家973项目(2010CB933501) （2010CB933501）
