以废旧锂电池为原料制备双稀土掺杂的CoFe_2O_4  

Preparation of couple rare earth doped CoFe_2O_4 from spent Li-ion batteries

作　　者：席国喜[1] 张烨 赵婷婷 敦长伟[1] 衡晓莹 XI Guoxi;ZHANG Ye;ZHAO Tingting;DUN Changwei;HENG Xiaoying(College of Chemistry and Chemical Engineering,Henan Normal University,Xinxiang 453007,Henan Province,China)

机构地区：[1]河南师范大学化学化工学院,河南新乡453007

出　　处：《电子元件与材料》2018年第11期20-25,共6页Electronic Components And Materials

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

摘　　要：以废旧锂离子电池为原料,加入化学辅助试剂,用溶胶-凝胶自蔓延的方法合成掺杂两种稀土离子(Nd、Ce、Ho和Pr两两组合掺杂)的钴铁氧体材料,针对其结构和性能进行探究,以期获得在应用中性能更优的样品。实验结果表明:掺杂稀土离子的样品与纯CoFe_2O_4样品比较微观结构发生了变化,导致磁性能和磁致伸缩性能受到影响。其中掺杂双稀土的样品饱和磁化强度在73～77 (A·m)/kg之间;除纯CoFe_2O_4外,掺杂Ce^(3+)和Nd^(3+)两种稀土离子的样品的饱和磁致伸缩系数较高,值为-163. 1×10^(-6);掺杂Ce~(^(3+))和Pr^(3+)的样品具有较高磁致伸缩灵敏度,其磁致伸缩灵敏度最大值是-1. 77×10^(-9)A^(-1)·m,对应的磁场强度也非常低,这种在低磁场强度下具备较好的磁致伸缩性能的样品在压力传感器和执行器等领域的应用中更具优势。A series of cobalt ferrite materials doped with two kinds of rare earth ions （ including two kinds of Nd, Ce, Ho,and Pr） were synthesized by sol - gel auto - combustion technique using spent Li - ion batteries as raw material. The structure andproperties of all samples were explored to optimize the performance in the application. The result of experiment shows that themicrostructure of samples doped with rare earth ions makes difference with that of pure CoFe2O4 . In the while, the magnetic andmagnetostrictive properties are affected by microstructure. The saturation magnetization of all the samples is concentrated in the 73-77（A·m） / kg. Except pure CoFe2O4 , the sample doped with Ce3＋and Nd3＋has higher saturation magnetostriction coefficient（-163. 1×10^（-6））. The sample doped with Ce3＋and Pr3＋has higher magnetostrictive sensitivity（-1. 77×10^（-9）A-1·m）, and the correspondingmagnetic field strength is quite low. This sample with better magnetostrictive property at low magnetic field strength has advantages inapplications such as pressure sensors and actuators.

关 键 词：废旧锂电池 钴铁氧体 微观结构 磁性能 磁致伸缩性能 双稀土离子掺杂 

分 类 号：TQ174.75[化学工程—陶瓷工业]