| 镝掺杂铁氧体纳米晶的制备、表征和磁性 |
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| 引用本文： | 蒋荣立,陈文龙,张宗祥,孙强,尹文萱. 镝掺杂铁氧体纳米晶的制备、表征和磁性[J]. 化学学报, 2008, 66(11): 1322-1326 |
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| 作者姓名： | 蒋荣立 陈文龙 张宗祥 孙强 尹文萱 |
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| 作者单位： | 中国矿业大学化工学院,徐州,221116;中国矿业大学化工学院,徐州,221116;中国矿业大学化工学院,徐州,221116;中国矿业大学化工学院,徐州,221116;中国矿业大学化工学院,徐州,221116 |
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| 基金项目： | 江苏省教育厅科研项目 , 中国矿业大学校科研和教改项目 |
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| 摘 要： | 采用化学共沉淀法制备出了镝掺杂铁氧体纳米晶, 利用透射电子显微镜(TEM)、X射线衍射仪(XRD)、傅立叶红外光谱仪(FTIR)、古埃磁天平、振动样品磁强计(VSM)、X射线能谱仪(EDX)等仪器对产物进行了表征, 研究了Dy3＋掺杂量对铁氧体纳米晶的结构、磁性和粒度的影响. 结果表明: 适量稀土元素镝离子的掺杂可以提高尖晶石型铁氧体的磁性、降低矫顽力, 当n(Fe3＋)∶n(Dy3＋)＝14∶1时其磁性最强. Dy3＋替代或充填进入了尖晶石晶格, 且主要占据B位. 掺杂了镝的铁氧体磁性纳米粒子粒度变小, 且分布更集中、均匀, 当Dy3＋加入量为n(Fe3＋)∶n(Dy3＋)＝14∶1时铁氧体纳米粒子的平均粒径由掺杂前的14 nm降低到到8 nm. 这种具有超顺磁性的软磁铁氧体纳米晶可应用于纳米磁液领域.
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| 关 键 词： | 尖晶石 铁氧体 镝 掺杂 磁性 |
| 收稿时间： | 2007-10-21 |
| 修稿时间： | 2007-10-21 |
Preparation, Characterization and Magnetic Properties of Ferrite Nanocrystals Doped with Dysprosium |
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| JIANG Rong-Li,CHEN Wen-Long,ZHANG Zong-Xiang,SUN Qiang,YIN Wen-Xuan. Preparation, Characterization and Magnetic Properties of Ferrite Nanocrystals Doped with Dysprosium[J]. Acta Chimica Sinica, 2008, 66(11): 1322-1326 |
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| Authors: | JIANG Rong-Li CHEN Wen-Long ZHANG Zong-Xiang SUN Qiang YIN Wen-Xuan |
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| Affiliation: | (School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116) |
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| Abstract: | Dy3＋-doped ferrite nanocrystals were prepared by a chemical co-precipitation method and characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Gouy magnetic balance, vibrating sample magnetometer (VSM), and X-ray energy spectrum (EDX), respectively. The effects of dysprosium contents on structure, magnetic properties and size of the ferrite were investigated. The results show that Dy3＋can enhance the magnetic properties which are strongest while n(Fe3＋)∶n(Dy3＋) is 14∶1 among the samples prepared, and weaken the coercive force of the spinel ferrite. Dy3＋ fills in the spinel ferrite lattice and mostly enters B site. The size of the Dy-doped ferrite nanoparticles becomes smaller and their distribution is more concentrated and uniform. The average diameter of the ferrite nanoparticles is 14 nm before doping and reduces to 8 nm after doping when n(Fe3＋)∶n(Dy3＋) is 14∶1. The results support the concept that the soft magnetic ferrite nanocrystals with superparamagnetism can be applied to nanometer magnetic fluid field. |
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| Keywords: | spinel ferrite dysprosium doping magnetic property |
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