铁酸钴纳米微粒的共沉淀法制备和磁性质(英文)

• 作 者: 徐莉 张洪涛 洪健民 邹文琴 周志萍 陈学太
• 机 构: 南京大学配位化学国家重点实验室配位化学研究所,南京大学配位化学国家重点实验室配位化学研究所,南京大学分析测试中心,南京大学物理系固体微结构国家重点实验室,南京大学化学化工学院,南京大学配位化学国家重点
• 出 处: 无机化学学报
• 发表日期: 2005年05期
• 关键词: 铁酸钴 共沉淀 磁性质

The cobalt ferrite nanoparticles were prepared by coprecipitation in the presence of poly (N-vinylpyrrolidone) (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.

The cobalt ferrite nanoparticles were prepared by coprecipitation in the presence of poly (N-vinylpyrrolidone) (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 The magnetic measurements indicated that nano-particles obtained at 400 ° C were superparamagnetic while that prepared at 600 ° C were ferrimagnetic at 400 ° C and 600 ° C were ca. 6 and 25 nm, respectively as obtained by transmission electron microscopy (TEM).