微波水热法制备掺稀土铁氧体纳米粒子  

Preparation of Ferrite Nanoparticles with Rare Earth Elements by Microwave Hydrothermal Method

作　　者：王欣[1] 李霞[1] 杨海峰[1] 王桂华[1] 

机构地区：[1]上海师范大学生命与环境科学学院,上海200234

出　　处：《上海师范大学学报（自然科学版）》2003年第2期55-58,共4页Journal of Shanghai Normal University(Natural Sciences)

基　　金：上海市科学技术委员会资助项目

摘　　要：用微波水热方法制备组成为Fe_2M_(1-x)RE_xO_4(x=0～0.3,M=Co^(2+),Ni^(2+),RE=La^(3+),Ce^(3+))的三元铁氧体纳米粒子,所得球形粒子粒度为10～20um.分析了各产物的晶体结构并对其进行磁性能的测量和表征。结果表明产物为尖晶石结构,饱和磁化强度较块体样品有不同程度地减小,其中镍铁氧体粒子呈超顺磁态,钻铁氧体为亚铁磁性。The nano-Fe2 M1-x RE2O4(x=0-0.3,M = Co2+,Ni2+,RE = La3+,Ce3+ ) particles was prepared by microwave hydrothermal method.The size of the particles is 10 ~ 20 nm.The crystalline structure and the magnetic properties had been studied.The particles have spinel structure and their saturation magnetizations are smaller than the bulk ferrite.The Ni-fer-rite is superparamagnetic,while Co-ferrite is ferromagnetic.

关 键 词：铁氧体纳米粒子 稀土元素 微波水热法 

分 类 号：TM277.1[一般工业技术—材料科学与工程]