Effect of Synthesis Temperature and NaOH Concentration on Microstructural and Magnetic Properties of Mn0.5Zn0.5Fe2O4 Nanoparticles

4th International Conference on Advanced Materials Science and Technology

Siregar, N.^1 ; Indrayana, I.P.T.^1 ; Suharyadi, E.^1 ; Kato, T.^2 ; Iwata, S.^3

Department of Physics, Universitas Gadjah Mada, Yogyakarta, Indonesia^1

Department of Electrical Engineering and Computer Science, Nagoya University, Nagoya, Japan^2

Institutes of Materials and Systems for Sustainability, Nagoya University, Nagoya, Japan^3

关键词: Coprecipitation method;    Crystallinities;    Ferrite content;    Micro-structural;    Multi-phase structures;    NaOH concentration;    Particles sizes;    Synthesis temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/202/1/012048/pdf
DOI  :  10.1088/1757-899X/202/1/012048

来源: IOP

【 摘 要 】

Mn0.5Zn0.5Fe2O4nanoparticles have been successfully synthesized through coprecipitation method by varying NaOH concentrations from 0.5 M to 6 M and synthesis temperatures from 30 to 120 °C. The X-ray diffraction (XRD) pattern indicates samples consisting of multiphase structures such as spinel of Mn0.5Zn0.5Fe2O4, α-MnO2, ZnO, λ-MnO2, and γ-Fe2O3. The crystallite size of Mn0.5Zn0.5Fe2O4is in the range of 14.1 to 26.7 nm. The Transmission electron microscope (TEM) image shows that sample was agglomerate. The hysteresis loops confirm that nanoparticles are soft magnetic materials with low coercivity (Hc) in the range of 45.9 to 68.5 Oe. Those values increased relatively with increasing particles size. For NaOH concentration variation, the maximum magnetization of the sample increased from 10.4 emu/g to 11.6 emu/g with increasing ferrite content. Meanwhile, the maximum magnetization increased from 7.9 to 15.7 emu/g for samples with various synthesis temperature. The highest coercivity of 68.5 Oe was attained for a sample of 6 M NaOH under 90 °C. The highest magnetization of 15.7 emu/g was achieved for a sample of 1.5 M NaOH under 120 °C caused by the maximum crystallinity of sample.