材料科学
纳米复合材料
微晶
铁氧体(磁铁)
热重分析
热液循环
微观结构
磁化
拉曼光谱
化学工程
结构精修
水热合成
分析化学(期刊)
复合材料
冶金
晶体结构
结晶学
磁场
化学
色谱法
物理
光学
量子力学
工程类
作者
Morteza Adibi,S. M. Mirkazemi,S. Alamolhoda
标识
DOI:10.1016/j.jmmm.2023.171187
摘要
The mechanical mixing (MM) and hydrothermal are known as prevalent and facile synthesis methods of the nanocomposite. In this research, the cobalt ferrite/ multi-wall carbon nanotubes (CF/MWCNTs) nanocomposites synthesized by these methods and microstructure and magnetic properties were investigated. The nanocomposites were characterized using X-ray diffraction (XRD), Field emission electron microscope (FESEM), Raman spectroscopy, thermal gravimetric analysis (TGA), differential thermal analysis (DTA), and vibration sample magnetometer (VSM). Furthermore, the specific surface area of prepared nanocomposite was measured by the Brunauer-Emmett-Teller (BET) method. The single-phase cobalt ferrite without any impurities was observed in XRD patterns. The samples’ mean crystallite size was calculated by the Williamson –Hall and Rietveld methods which show that samples prepared by hydrothermal procedure has a larger crystallite size. Also, the obtained nanocomposites by both methods have a suitable phase distribution of CF nanoparticles and MWCNTs according to the FE-SEM micrographs. Moreover, the maximum magnetization (Mmax) for samples prepared by MM and hydrothermal methods were 35.6 and 49.5 emu/g, respectively. It is noteworthy that the Mmax values increase by 13.5 emu/g for sample synthesized by hydrothermal method compare to MM preparation. The results revealed that the presence of MWCNTs in the synthesis medium leads to cobalt ferrite nanoparticle growth and thus improves the magnetic properties.
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