柠檬酸溶胶-凝胶法制备纳米钡铁氧体及其磁性能  

A STUDY OF MAKING NANO BARIUM FERRITES AND MAGNETIC PROPERTIES BY CITRIC ACID SOL-GEL METHOD

作　　者：李明玲[1] 孔迪[1] 常靖宇[1] 马振振 李宏林[1] 

机构地区：[1]巢湖学院,安徽巢湖238000

出　　处：《巢湖学院学报》2016年第6期40-44,66,共6页Journal of Chaohu University

基　　金：2016年度国家级大学生创新创业训练计划项目(项目编号:201610380018);安徽大学"微弱信号感测材料与器件集成"协同创新研究中心2014年开放课题(项目编号:01001795-2014-02);巢湖学院自然科学研究项目(项目编号:XLY-201416)

摘　　要：以柠檬酸为络合剂,利用溶胶-凝胶法制备了M型钡铁氧体纳米粉体,研究了柠檬酸掺量、溶胶pH值等参数对粉体晶体结构与磁性能的影响。利用X射线衍射仪、振动样品磁强计对所得样品的结构与磁性能进行了表征与分析。结果表明:柠檬酸与金属离子摩尔比为2:1,溶胶pH值为9,煅烧温度为900℃的条件下制备的钡铁氧体纳米粉体,结晶良好,晶粒尺寸41 nm,矫顽力达到最大值,6053 Oe。This paper studies the influence of citric acid content and pH value of colloid on the powder and crystal structure, and magnetic properties of citric acid by using the citric acid as complex agent and making the M-type nano-powder of barium ferrite through the sol-gel method. The structure and magnetic properties of the obtained samples are characterized and analyzed by X-ray diffraction and vibrating sample magnetometer. The results show that pure nano-powder of barium ferrite obtained under the conditions that the molar ratio of citric acid to metal ions was 2：1, the pH value of the sol is 9, and calcination temperature is 900℃ is well-crystallized. Furthermore, the coercivity of the powder reaches the maximum of 6053 Oe.

关 键 词：柠檬酸 溶胶-凝胶法 纳米钡铁氧体 磁性能 

分 类 号：TB34[一般工业技术—材料科学与工程]