单分散纳米锌铁氧体的制备及其磁性能  

Synthesis and Magnetic Properties of Monodisperse ZnFe_2O_4 Nanoparticles

作　　者：赵海涛[1] 张强[1] 刘瑞萍[1] 丁学勇[2] 马瑞廷[1] 

机构地区：[1]沈阳理工大学材料科学与工程学院,沈阳110159 [2]东北大学材料与冶金学院,沈阳110189

出　　处：《材料工程》2016年第1期103-107,共5页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目(51303108);辽宁省高等学校优秀人才支持计划项目(LJQ2014025);辽宁省自然科学基金资助项目(2014020094)

摘　　要：以乙酰丙酮铁和乙酰丙酮锌为前驱体,三乙二醇为溶剂,采用多元醇法制备了单分散的ZnFe_2O_4纳米颗粒。通过X射线衍射仪(XRD)、透射电子显微镜(TEM)和振动样品磁强计(VSM)等对样品的结构、形貌和磁性能进行了表征。结果表明:所制备的ZnFe_2O_4纳米颗粒分散性较好,尺寸均一,平均粒径为5.6nm;在室温下产物的饱和磁化强度为18.10A·m^2/kg,剩磁较小,矫顽力为9355A/m,表现出亚铁磁性;50mg和100mg的样品分别与lmL水形成的悬浮液,在交变磁场中升温分别可达到22℃和30℃,表现出一定的磁热性能。Monodisperse ZnFe2O4 nanoparticles were synthesized by polyol process using triethylene glycol as solvent and iron acetylacetonate and zinc acetylacetonate as precursors.The structure,morphology and magnetic properties of resultant particles were characterized by X-ray diffraction（XRD）,transmission electron microscopy（TEM）and vibrating sample magnetometry（VSM）.The results show that as-synthesized nanoparticles have uniform size and good dispersibility.The average size of the nanoparticles is 5.6nm.The monodisperse ZnFe2O4 nanoparticles show a typical magnetic hysteresis loop at room temperature（300K）,which indicates that the sample has ferrimagnetic behavior with less residual magnetism,coercive force of 9355A/m at room temperature.The saturation magnetization of the nanoparticles at 300 Kis determined to be 18.10A·m^2/kg.The temperature rise of the suspension of 50 mg and 100 mg samples in 1mL water can reach up to 22℃ and 30℃under magnetic field respectively,revealing sufficient magnet-heating ability.

关 键 词：铁氧体 多元醇法 磁热效应 亚铁磁性 

分 类 号：TB332[一般工业技术—材料科学与工程] TM25[电气工程—电工理论与新技术]