MnFe_2O_4多晶微粉的共沉淀法制备及磁性研究  

Studies on Preparation by Coprecipitation Method and Magnetization of MnFe_2O_4 Polycrystalline Powders

作　　者：张变芳[1] 唐贵德[1] 王振彪[2] 郑乔[2] 刘虎[2] 潘成福[1] 

机构地区：[1]河北师范大学物理学院,河北石家庄050016 [2]石家庄铁道学院数理系,河北石家庄050043

出　　处：《材料科学与工程学报》2004年第3期397-400,共4页Journal of Materials Science and Engineering

基　　金：国家自然科学基金资助项目 (No.1 0 0 740 1 3)

摘　　要：用化学共沉淀法制备了MnFe2 O4 铁酸盐多晶微粉 ,发现与NiFe2 O4 相比 ,MnFe2 O4 的制备有其独特之处 :反应温度在 80℃以上时 ,经沉淀洗涤后直接得到MnFe2 O4 纳米微粉 ,不需热处理过程 ;反应温度在 80℃以下时 ,需要对沉淀洗涤后前驱体进行热处理才能得到MnFe2 O4 纳米微粉。利用振动样品磁强计测量了样品在室温下的磁性能 ;利用X射线衍射确定了粉体的组成、晶粒大小和晶格常数 ;利用扫描电子显微镜观察了颗粒的形貌。MnFe -2O -4 polycrystalline powders are prepared by Chemical coprecipitation method.Reaction mechanism of preparing Manganese ferrite is different from that of Nickel ferrite:when the reaction temperature is higher than 80℃,after depositing and washing we can get MnFe -2O -4directly without calcining,but when the reaction temperature is lower than 80℃,after depositing and washing we have to calcine the precursor,only in this way we can gain MnFe -2O -4.The magnetic property of powders was characterized using Vibrating Sample Magnetometer.The phase structure,crystal size and lattice constant were presented by X-ray diffractometer.In addition,the morphology of the powders grain was observed by Scan electron microscope.

关 键 词：多晶微粉 化学共沉淀法 热处理 MnFe2O4 磁性能 尖晶石型铁氧体 

分 类 号：TM277[一般工业技术—材料科学与工程]