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Magnetic and magnetostrictive properties of non-stoichiometric cobalt ferrite synthesized from spent Li-ion batteries
Journal of Magnetism and Magnetic Materials ( IF 2.7 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.jmmm.2020.167185 Changwei Dun , Guoxi Xi , Ye Zhang , Xiaoying Heng , Yumin Liu , Xinyan Xing , Rui Liang
Journal of Magnetism and Magnetic Materials ( IF 2.7 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.jmmm.2020.167185 Changwei Dun , Guoxi Xi , Ye Zhang , Xiaoying Heng , Yumin Liu , Xinyan Xing , Rui Liang
Abstract A series of Co1+xFe2−2x/3O4 (x = 0, 0.05, 0.1, 0.15, 0.2) samples, in which Fe3+ was progressively replaced by Co2+, were prepared through the sol-gel auto-combustion method using spent Li-ion batteries as raw materials. The structure, morphology, magnetic and magnetostrictive properties of the samples were studied. The purpose of the present work is to make cobalt ferrite more suitable for its application in non-contact sensors and actuators. X-ray diffraction (XRD) patterns show that all the samples have a pure single-phase cubic structure. The non-stoichiometric cobalt ferrite has different crystallite size and lattice constant compared with pure CoFe2O4. Field emission scanning electron microscopy (FE-SEM) was carried out to investigate the amount and size of pores in the sintered samples. The cationic oxidation state and cation distribution of the spinel structure was investigated by means of X-ray photoelectron spectroscopy (XPS). The variations in structure and morphology were found to lead to significant changes in the magnetic and magnetostrictive properties. With the increase of cobalt content, the saturation magnetization and the maximum magnetostrictive coefficient of the samples initially increase and then decrease. Given the different behaviors of the magnetostriction coefficient and strain sensitivity of the samples, their magnetostrictive performance was quantified through a “figure of merit” defined as the product between the two above mentioned parameters.
中文翻译:
废锂离子电池合成非化学计量钴铁氧体的磁性和磁致伸缩特性
摘要 采用溶胶-凝胶自燃法,利用废锂离子通过溶胶-凝胶自燃法制备了一系列 Co1+xFe2−2x/3O4 (x = 0, 0.05, 0.1, 0.15, 0.2) 样品,其中 Fe3+ 逐渐被 Co2+ 取代。离子电池为原料。对样品的结构、形貌、磁性和磁致伸缩特性进行了研究。目前工作的目的是使钴铁氧体更适合其在非接触式传感器和执行器中的应用。X 射线衍射 (XRD) 图案显示所有样品均具有纯单相立方结构。与纯 CoFe2O4 相比,非化学计量钴铁氧体具有不同的微晶尺寸和晶格常数。进行场发射扫描电子显微镜(FE-SEM)以研究烧结样品中孔的数量和尺寸。通过X射线光电子能谱(XPS)研究了尖晶石结构的阳离子氧化态和阳离子分布。发现结构和形态的变化导致磁性和磁致伸缩特性的显着变化。随着钴含量的增加,样品的饱和磁化强度和最大磁致伸缩系数先增大后减小。鉴于样品的磁致伸缩系数和应变敏感性的不同行为,它们的磁致伸缩性能通过定义为上述两个参数之间的乘积的“品质因数”来量化。发现结构和形态的变化导致磁性和磁致伸缩特性的显着变化。随着钴含量的增加,样品的饱和磁化强度和最大磁致伸缩系数先增大后减小。鉴于样品的磁致伸缩系数和应变敏感性的不同行为,它们的磁致伸缩性能通过定义为上述两个参数之间的乘积的“品质因数”来量化。发现结构和形态的变化导致磁性和磁致伸缩特性的显着变化。随着钴含量的增加,样品的饱和磁化强度和最大磁致伸缩系数先增大后减小。鉴于样品的磁致伸缩系数和应变敏感性的不同行为,它们的磁致伸缩性能通过定义为上述两个参数之间的乘积的“品质因数”来量化。
更新日期:2020-11-01
中文翻译:
废锂离子电池合成非化学计量钴铁氧体的磁性和磁致伸缩特性
摘要 采用溶胶-凝胶自燃法,利用废锂离子通过溶胶-凝胶自燃法制备了一系列 Co1+xFe2−2x/3O4 (x = 0, 0.05, 0.1, 0.15, 0.2) 样品,其中 Fe3+ 逐渐被 Co2+ 取代。离子电池为原料。对样品的结构、形貌、磁性和磁致伸缩特性进行了研究。目前工作的目的是使钴铁氧体更适合其在非接触式传感器和执行器中的应用。X 射线衍射 (XRD) 图案显示所有样品均具有纯单相立方结构。与纯 CoFe2O4 相比,非化学计量钴铁氧体具有不同的微晶尺寸和晶格常数。进行场发射扫描电子显微镜(FE-SEM)以研究烧结样品中孔的数量和尺寸。通过X射线光电子能谱(XPS)研究了尖晶石结构的阳离子氧化态和阳离子分布。发现结构和形态的变化导致磁性和磁致伸缩特性的显着变化。随着钴含量的增加,样品的饱和磁化强度和最大磁致伸缩系数先增大后减小。鉴于样品的磁致伸缩系数和应变敏感性的不同行为,它们的磁致伸缩性能通过定义为上述两个参数之间的乘积的“品质因数”来量化。发现结构和形态的变化导致磁性和磁致伸缩特性的显着变化。随着钴含量的增加,样品的饱和磁化强度和最大磁致伸缩系数先增大后减小。鉴于样品的磁致伸缩系数和应变敏感性的不同行为,它们的磁致伸缩性能通过定义为上述两个参数之间的乘积的“品质因数”来量化。发现结构和形态的变化导致磁性和磁致伸缩特性的显着变化。随着钴含量的增加,样品的饱和磁化强度和最大磁致伸缩系数先增大后减小。鉴于样品的磁致伸缩系数和应变敏感性的不同行为,它们的磁致伸缩性能通过定义为上述两个参数之间的乘积的“品质因数”来量化。