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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
Author NameAffiliationE-mail
李巧玲* Department of Chemistry, School of Science, North University of China, Taiyuan 030051, China qiaolingl@163.com 
常传波 Department of Chemistry, School of Science, North University of China, Taiyuan 030051, China  
张巍 Department of Chemistry, School of Science, North University of China, Taiyuan 030051, China  
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
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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