Zheng Liyun, Fang Kan, Zhang Meiling, Nan Zhixian, Zhao Lixin, Zhou Dong, Zhu Minggang, Li Wei
College of Materials Science and Engineering, Hebei University of Engineering Handan 056038 China
Division of Functional Materials, Central Iron & Steel Research Institute 76 Xueyuan South Road Beijing 100081 China
RSC Adv. 2018 Nov 23;8(68):39177-39181. doi: 10.1039/c8ra07487a. eCollection 2018 Nov 16.
Monodispersed magnesium ferrite nanoparticles with enhanced magnetic properties were successfully fabricated by a simple solvothermal method without employing any templates, complex apparatus or techniques. The structure, morphology, composition, and magnetic properties of the products were tuned and characterized by X-ray powder diffraction, transmission electron microscopy, scanning electron microscopy and vibrating sample magnetometry. The results show that the reaction time and temperature have an important influence on the morphology, composition, structure and particle size of the synthesized MgFeO nanoparticles. Not only the size, size distribution, crystallization, but also the atomic ratio of Mg : Fe has a decisive effect on their magnetic properties. The MgFeO magnetic nanoparticles synthesized at 180 °C for 12 hours have excellent dispersion, narrow size distribution, good crystallinity and a Mg : Fe atomic ratio of approximately 1 : 4.53 and an average particle size of 114.3 nm, thus the highest saturation magnetization of 67.35 emu g. It provides a reliable synthesis method for the better application of spinel structure magnesium ferrite nanoparticles in the future.
通过一种简单的溶剂热法，在不使用任何模板、复杂仪器或技术的情况下，成功制备出具有增强磁性的单分散镁铁氧体纳米颗粒。通过X射线粉末衍射、透射电子显微镜、扫描电子显微镜和振动样品磁强计对产物的结构、形态、组成和磁性进行了调整和表征。结果表明，反应时间和温度对合成的MgFeO纳米颗粒的形态、组成、结构和粒径有重要影响。不仅尺寸、尺寸分布、结晶度，而且Mg:Fe的原子比对其磁性也有决定性作用。在180℃下反应12小时合成的MgFeO磁性纳米颗粒具有优异的分散性、窄尺寸分布、良好的结晶度，Mg:Fe原子比约为1:4.53，平均粒径为114.3nm，因此具有67.35emu g的最高饱和磁化强度。它为未来更好地应用尖晶石结构镁铁氧体纳米颗粒提供了一种可靠的合成方法。
