摘要
为了研发新型细胞解冻剂,采用共沉淀法合成磁性CoFe2O4纳米粒子,并通过X射线衍射(XRD)、透射电镜(TEM)、振动样品磁强计等对其理化性能进行了表征,初步探讨了CoFe2O4纳米悬浮液在交变磁场作用下的热效应。结果表明:随着热处理温度升高,颗粒长大;100℃浸渍后的颗粒粒径为10—12 nm,经700℃热处理后的颗粒尺寸增大为30—40 nm。样品的饱和磁化强度和剩余磁化强度也随着热处理温度的升高而增加。不同浓度的CoFe2O4纳米悬浮液在交变磁场中的升温速度和恒定温度随着浓度的增加而增加。
In this paper, CoFe2O4 nanoparticles were synthesized by coprecipitation method. The physico-chemical properties of CoFe2O4 nanoparticles were characterized by X-ray diffraction, TEM photographs and Vibrating sample magnetometer. Furthermore, the heating effect of CoFe2O4 nanoparticles suspension under the alternating magnetic field was researched. The results show that the sizes of CoFe2O4 particles increases with the heat-treated temperature increases, it is 10-12 nm when heated at 100 ℃ and it increases to 30-40 nm when heated at 700 ℃, the saturation magnetization and remnant magnetization increases with the heat-treated temperature too. Under the ahernating magnetic field, both the heating rate and the stable temperature of the CoFe2O4 nanoparticles suspension increase with the increasing of concentration.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2009年第6期9-12,共4页
Journal of Wuhan University of Technology
基金
湖北省自然科学基金(2006ABA189)
关键词
钴铁氧体
纳米粒子
合成
磁性能
热效应
cobalt ferrite nanoparticles
nanaparticles
synthesis
magnetic properties
heating effect
