摘要
以氯化钴，水合肼为起始原料，乙二醇为溶剂，采用溶剂热法制得链状结构的金属钴亚微米粒子。通过X射线衍射分析标定了获得样品的物相为六角堆积（hcp）结构，用透射及扫描电镜观察了样品的形貌，颗粒具有链状结构，长达数微米，构成长链结构的亚微米粒子为球形，粒径约为800hm左右。用振动样品磁强计表征了样品的静磁性能，测得的饱和磁化强度为163．76emu/g，矫顽力为104．20×79．6A/m。同时简要探论了链状结构的钴亚微米粒子形成机理，初步认为其形成过程是一个络合-还原-成核-组装的过程。
Chain-like cobalt particles were successfully prepared by the solvothermai method using COCl2·4H2O and N2H4·H2O as raw materials, and cetyltrimethylamonium bromide （CTAB） as surfactant. Microstructure and morphology of the prepared products has been characterized by means of transmission electron microscopy（TEM）, scanning electron microscopy（SEM）, and selected area electron diffraction（SAED） and X-ray diffraction（XRD）. The results showed the assemblie has chain-like apparent structure with a length of up to several micrometers. The individual sub-microspheres had a diameter of about 800 nm. Magnetic hysteresis measurement revealed that the chain-like Co assemblies displayed ferromagnetic behaviors with a saturation magnetization of 163.76 emu/g and a coercivity of 104.20×79.6A/m at room temperature. The mechanism of the formation of chain-like Co particles was also simply investigated.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2007年第A03期1050-1052,共3页
Journal of Functional Materials
关键词
溶剂热法
钴
链状
静磁性能
机理
solvothermalmethod
chain-likeparticles
cobalt
magneticproperties
formation mechanism
