ZnxCoFe2O4的制备及磁性能和磁致伸缩性能的研究  

Preparation and investigation of the magnetic and magnetostrictive performances of Zn_xCoFe_2O_4

作　　者：席国喜[1] 张烨 赵婷婷 敦长伟[1] 王路 XI Guo-xi;ZHANG Ye;ZHAO Ting-ting;DUN Chang-wei;WANG Lu(College of Chemistry&Chemical Engineering,Henan Normal University,Key Laboratory of Water Environment&Pollution Control Ministry of Education of the Yellow River and Huaihe River,Xinxiang 453007,China)

机构地区：[1]河南师范大学化学化工学院,黄河与淮河水环境与污染控制教育部重点实验室,河南新乡453007

出　　处：《化学研究与应用》2018年第10期1713-1720,共8页Chemical Research and Application

基　　金：国家自然科学基金资助项目(51174083)资助;河南省高等学校重点科研项目应用研究计划(18B150008)资助

摘　　要：本实验采用溶胶—凝胶自蔓延的方法,将富含Co元素的废旧锂电池加工成一系列的含锌量不同的钴铁氧体样品,并对不同锌含量样品的形貌、结构、磁性能和磁致伸缩性能进行研究。实验结果表明:含锌的钴铁氧体是尖晶石结构的晶体,与Co Fe_2O_4相比,微观结构和形貌发生了变化,因此,性质发生了明显的变化。随着锌含量的增加,样品的饱和磁化强度先增加后减小;最大磁致伸缩系数整体递减;磁致伸缩应变导数的最大值整体递增,该值对应的磁场强度逐渐降低。研究表明:Zn^(2+)含量为0.4时,样品的最大磁致伸缩系数,最大应变导数及其对应的场强分别是-134.8 ppm,-2.12×10^(-9)A^(-1)m和20.0KA·m^(-1),即应变导数在较低的磁场强度下取得最大值,使用该样品制备而成的器件在非接触式传感器和执行器方面的应用中可能更具优势。A series of samples of cobalt ferrite with different zinc content were prepared by sol-gel auto-combustion method using spent Li-ion batteries.The morphology,structure,magnetic properties,and magnetostrictive properties of the samples with different zinc contents were studied.The purpose of experimental is to optimize the use of cobalt ferrite for non-contact sensors and actuators.The results of experimental show that the zinc-containing cobalt ferrite is a crystal with spinel structure.Compared with CoFe 2O 4,the structure and morphology of zinc-containing cobalt ferrite have changed.Therefore,the properties have changed significantly.With the increase of zinc content,the saturation magnetization of the samples increases firstly and then decreases.The maximum magnetostrictive coefficient tends to reduce gradually.The maximum value of the magnetostrictive strain derivative tends to increase gradually,and the corresponding magnetic field strength gradually decreases.The results show that when the content of Zn 2+reaches 0.4,the maximum magnetostriction coefficient,the maximum value of the magnetostrictive strain derivative and the corresponding magnetic field strengths of the prepared sample are-134.8 ppm,-2.12×10-9 A-1 m,20.0KA·m-1,respectively.The strain derivative reaches the maximum at a lower magnetic field strength.This sample has advantages in the application of non-contact sensors and actuators.

关 键 词：废旧锂电池 钴铁氧体 磁性能 磁致伸缩性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]