无机化学学报
無機化學學報
무궤화학학보
JOURNAL OF INORGANIC CHEMISTRY
2005年
5期
741-743
,共3页
徐莉%张洪涛%洪健民%邹文琴%周志萍%陈学太
徐莉%張洪濤%洪健民%鄒文琴%週誌萍%陳學太
서리%장홍도%홍건민%추문금%주지평%진학태
铁酸钴%共沉淀%磁性质
鐵痠鈷%共沉澱%磁性質
철산고%공침정%자성질
cobalt ferrite%coprecipitation%magnetic properties
The cobalt ferrite nanoparticles were prepared by coprecipitation in the presence of poly (Nvinylpyrrolidone) (PVP) and characterized by XRD, TEM, EDX and magnetometry. XRD results suggest the formation of pure cobalt ferrite. The mean particle sizes of CoFe2O4 samples annealed at 400 ℃ and 600 ℃ were ca.6 and 25 nm, respectively as obtained by transmission electron microscopy (TEM). The magnetic measurements indicated that nano-particles obtained at 400 ℃ were superparamagnetic while that prepared at 600 ℃ were ferrimagnetic.
