摘要
以乙酰丙酮铁(C_(15)H_(21)FeO_6)和二氧化硅纳米颗粒(SiO_2)分别作为铁和硅的前驱体,280℃低温固相法合成Fe_3Si纳米颗粒,同时加入钠盐(NaCl)调控颗粒的尺寸。利用扫描电子显微镜、原子力显微镜、X射线衍射和超导量子磁强计对所制备的Fe_3Si纳米颗粒进行表征分析。研究发现该法可以高效制备稳定的DO_3型Fe_3Si纳米颗粒,加入的NaCl能有效调控颗粒粒径。随着Fe_3Si纳米颗粒尺寸的减小,Fe_3Si纳米颗粒的居里温度、截止温度均有明显降低,饱和磁化强度也有所减小。
Ferric acetylacetonate and SiO2 nanoparticles were utilized as precursors to synthesize metal silicide Fe3Si nanoparticles by a low-temperature solid-phase reaction（at 280 ℃）, where Na Cl was added as inhibitor to control the particle size. Scanning electron microscope（SEM）, atomic force microscope（AFM）, X-ray powder diffraction（XRD） and superconductivity quantum interference device（SQUID） were utilized to characterize the morphology, particle size, crystal phase and magnetic properties of as prepared Fe3Si nanoparticles. Results reveal that the as prepared sample is indexed to stable DO3 type Fe3Si, the size of which could be tuned by the addition of Na Cl. The further magnetic properties investigation manifests that Curie temperature, blocking temperature and magnetization of the as prepared Fe3Si nanoparticles decrease with decreasing of the particle size.
出处
《电子元件与材料》
CAS
CSCD
2016年第2期18-21,共4页
Electronic Components And Materials
基金
国家自然科学基金资助项目(No.51173038
No.51303046)
关键词
Fe3Si纳米颗粒
SiO2纳米颗粒
低温固相反应
居里温度
截止温度
饱和磁化强度
Fe3Si nanoparticles
SiO2 nanoparticles
low-temperature solid-phase reaction
Curie temperature
blocking temperature
saturation magnetization
