Mg^(2+)-Zr^(4+)复合取代对CoFe_(2)O_(4)磁致伸缩材料性能的影响  

The effect of Mg^(2+)-Zr^(4+) substitution on the properties of CoFe_(2)O_(4) magnetostrictive material

作　　者：王桂娟 李元勋[1] 陆永成 彭睿 付饶[1] WANG Gui-juan;LI Yuan-xun;LU Yong-cheng;PENG Rui;FU Rao(State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Technology of China,Chengdu 610054,China)

机构地区：[1]电子科技大学电子科学与工程学院,四川成都610054

出　　处：《磁性材料及器件》2021年第5期12-16,共5页Journal of Magnetic Materials and Devices

基　　金：四川省重大科技专项基金资助项目(2019ZDZX0026)。

摘　　要：为了实现钴铁氧体在低磁场下有较高的应变灵敏度,采用Mg^(2+)-Zr^(4+)协同取代的方式,通过固相合成法制备了CoFe_(2)O_(4)磁致伸缩材料,并研究了Mg^(2+)-Zr^(4+)复合取代对材料的微观结构、饱和磁化强度、磁致伸缩性能及应变灵敏度的影响。结果表明,在1300℃烧结的样品均为纯净的尖晶石相,并且随着Zr^(4+)离子取代量的增加,材料的饱和磁化强度与磁晶各向异性常数呈现增大趋势,磁致伸缩系数减小,应变灵敏度先增大后减小。在Mg^(2+)取代量为0.05、Zr^(4+)取代量为0.02时,低磁场域下CoFe_(2)O_(4)磁致伸缩材料的应变灵敏度达到最高值,为4.3×10^(-9) A/m,可应用于磁传感器等领域。In order to realize the high strain sensitivity of cobalt ferrite in low magnetic field,the Mg^(2+)-Zr^(4+)cooperative substitution was used to prepare CoFe_(2)O_(4)magnetostrictive material by solid-phase synthesis method,and studied the influence of Mg^(2+)-Zr^(4+)cooperative substitution on the microstructure,saturation magnetization,magnetostrictive performance and strain sensitivity of materials.The results showed that the samples sintered at 1300℃were all pure spinel phases,and with the increase of ion substitution,the saturation magnetization and the magnetocrystalline anisotropy coefficient of the material increase,the magnetostriction coefficient decreases,and the strain sensitivity first increases and then decreases.When the substitution amount of Mg^(2+)was 0.05 and the substitution amount of Zr^(4+)was 0.02,the strain sensitivity of CoFe_(2)O_(4)magnetostrictive material in the low magnetic field reaches the highest value,4.3×10^(-9)A/m,which can be used in magnetic sensors and other fields.

关 键 词：钴铁氧体(CoFe_(2)O_(4)) 固相反应法 Mg^(2+)-Zr^(4+)协同取代 磁致伸缩系数 应变灵敏度 

分 类 号：TM27[一般工业技术—材料科学与工程] O482.526[电气工程—电工理论与新技术]