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Preparation of MnxNi0.5-xZn0.5Fe2O4 Nanorods by the Co-precipitation Method
李巧玲*, 常传波, 张巍, 张豪
Department of Chemistry, School of Science, North University of China, Taiyuan 030051, China
Abstract:
MnxNi0:5-xZn0:5Fe2O4 nanorods were successfully synthesized by the thermal treatment of rod-like precursors that were fabricated by the co-precipitation of Mn2+, Ni2+, and Fe2+ in the lye. The phase, morphology, and particle diameter were examined by the X-ray diffrac-tion and transmission electron microscopy. The magnetic properties of the samples were stud-ied using a vibrating sample magnetometer. The results indicated that pure Ni0:5Zn0:5Fe2O4 nanorods with a diameter of 35 nm and an aspect ratio of 15 were prepared. It was found that the diameter of the MnxNi0:5-xZn0:5Fe2O4 (0≤x≤0.5) samples increased, the length and the aspect ratio decreased, with an increase in x value. When x=0.5, the diameter and the aspect ratio of the sample reached up to 50 nm and 7~8, respectively. The coercivity of the samples first increased and then decreased with the increase in the x value. The coer-civity of the samples again increased when the x value was higher than 0.4. When x=0.5,the coercivity of the MnxNi0:5-xZn0:5Fe2O4 sample reached the maximal value (134.3 Oe)at the calcination temperature of 600 oC. The saturation magnetization of the samples first increased and then decreased with the increase in the x value. When x=0.2, the satura-tion magnetization of the sample reached the maximal value (68.5 emu/g) at the calcination temperature of 800 oC.
Key words:  MnxNi0.5-xZn0.5Fe2O4, Nanorod, Co-precipitation, Magnetic property
FundProject:
针状纳米MnxNi0.5-xZn0.5Fe2O4的共沉淀法制备及表征
Qiao-ling Li*, Chuan-bo Chang, Wei Zhang, Hao Zhang
中北大学理学院化学系, 太原030051
摘要:
通过在碱液中共沉淀Mn2+、Ni2+和Fe2+后制备了棒状的前躯体,前躯体于不同温度煅烧后制得了MnxNi0:5-xZn0:5Fe2O4棒状体. 利用X射线衍射仪和透射电镜对棒状体的物相、形貌及粒径进行了表征,并利用振动样品磁强计对磁性能进行研究. 结果表明长径比大于15的棒状,随着x值的增加,MnxNi0:5-xZn0:5Fe2O4样品的直径增加,长度下降,长径比变小,当x=0.5时其直径在50 nm左右而长径比减小到7~8. 随着x值的增加,样品的矫顽力先增加后减少,x值达到0.4时样品的矫顽力再次增加,当煅烧温度为600 oC,x=0.5时样品的矫顽力最大为134.3 Oe. 饱和磁化强度随着x值的增加先增加后减少,当煅烧温度为800 oC和x=0.2时达到最大为68.5 Oe.
关键词:  MnxNi0.5-xZn0.5Fe2O4,纳米棒,共沉淀法,磁性能
DOI:10.1088/1674-0068/23/06/680-684
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