中南大学学报（自然科学版）2025，Vol.56Issue(3)：859-867,9.DOI:10.11817/j.issn.1672-7207.2025.03.004
Co掺杂对高温固相制备(Fe,Ni,Co,Cu)Fe2O4磁性晶体结构和磁性能的影响
Effect of Co doping on crystal structure and magnetic properties of(Fe,Ni,Co,Cu)Fe2O4 prepared by high temperature solid-state reaction
摘要
Abstract
When using high-temperature oxidation method to recover iron resources in nickel slag,there are magnetic crystals enriched with Fe,Ni,Co,Cu and other elements in the recovered products.Firstly,magnetic crystals(Fe,Ni,Co,Cu)Fe2O4 were prepared by the high-temperature solid-phase method.Secondly,the effects of cooling methods on the crystal structure and microscopic morphology of the samples were analyzed by X-ray diffractometer,field-emission scanning electron microscope,and vibrating sample magnetometer.Finally,the effects of the content of Co on the structure of the magnetic crystals and the parameters of magnetic properties were discussed.The results show that the samples prepared by slow cooling are highly crystallized and have the best crystal structure compared with those prepared by air cooling and water cooling.Co content has little effect on the structure and morphology of magnetic crystals,but with the increase of Co content,the grain diameter of magnetic crystals decreases gradually,the saturation magnetization and remanence increase gradually,and the coercivity increases first and then decreases and increases finally.The magnetite phase crystals obtained by elemental doping have soft magnetic ferrite characteristics and unique structure and magnetic properties,which indicates that reasonable control of elemental doping in the nickel slag recycling product can realize its high value utilization.关键词
高温固相法/尖晶石铁氧体/磁性能/微观结构Key words
high temperature solid-state reaction method/spinel ferrite/magnetic properties/microstructure分类
冶金工业引用本文复制引用
杨永坤,周欣,申雯婷,王冠杰,王伟安,王国华,李小明..Co掺杂对高温固相制备(Fe,Ni,Co,Cu)Fe2O4磁性晶体结构和磁性能的影响[J].中南大学学报（自然科学版）,2025,56(3):859-867,9.基金项目
国家自然科学基金资助项目(U22A20175,52304358)(Projects(U22A20175,52304358)supported by the National Natural Science Foundation of China) （U22A20175,52304358）
