利用稀土镝对Fe3O4纳米磁粒子改性的研究

材料写作网    时间: 2020-07-01 08:47:06     阅读:次

摘 要: 采用湿化学法制备了稀土镝铁氧体纳米磁粒子,并用月桂酸进行了表面修饰。利用 透射电子显微镜(TEM)、X射线衍射仪(XRD)、振动样品磁强计(VSM)等仪器对产物进行 表征,研究Dy3+的掺杂对Fe3O4纳米磁粒子磁性能的影响;同时对镝铁氧体磁粒 子形貌、粒径分布、晶型结构进行了分析。结果表明,用适量的稀土Dy3+对Fe3O 4纳米磁粒子进行掺杂 ,可以显著地提高其磁性能,且晶型结构不变;制备的镝铁氧体磁粒子的平均粒径约13.2nm,表面修饰后的磁粒子室温下的饱和磁化强度为189.4 mT,具有 超顺磁性。

关键词:Fe3O4纳米磁粒子;稀土镝;磁性能;改性

中图分类号:TQ92:TQ050.4文献标 识码:A文章编号:1672-1098(2010)02-0051-0 4

Study on Performance of Fe3O4 Magnetic Nano-particles

Reshaped by Dysprosium

DENG Zhen-juan,GUO Yuan,ZHANG Mao-run

(School of Chemical Engineering, Anhui University of Science and Technology, Hua inan Anhui 232001, China)

Abstract:Rare earth dysprosium ferrite magnetic nano-particles were prepared bywet chemistry method and modified with lauric acid. Dy3+-doping ferritenano-particles were characterized by transmission electron microscopy (TEM), X -ray diff raction (XRD),and vibrating sample magnetometer (VSM), respectively.The influenc e of Dy3+-doping on Fe3O4 nano-particles magnetism was studied. Theappearance,particle diameter distribution, crystal form construction of dysprosium ferritenano-magnetic particles were analyzed. The result shows, Proper amount of Dy 3+-doping will improve the saturation magnetization of Fe3O4 magnetic n ano-particle s, and crystal form construction were not changed. The mean diameter this studyprepared is 13.2 nm, and the modified paticles’ saturation magnetiza tion intensi ty is 189.4 mT in ordinary temperature, which has superparamagnetism.

Key words:Fe3O4 magnetic nano-particles; rare earth dy sprosium; mag...

== 试读已结束，如需继续阅读敬请充值会员 ==

本站文章均为原创投稿，仅供下载参考，付费用户可查看完整且有格式内容！ (费用标准：38元/2月，98元/2年，微信支付秒开通！)

升级为会员即可查阅全文 。如需要查阅全文，请 免费注册 或 登录会员