| Fe3O4磁流体制备及磁性能研究 |
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| 引用本文： | 王煦漫,张彩宁,古宏晨. Fe3O4磁流体制备及磁性能研究[J]. 化工新型材料, 2009, 37(1) |
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| 作者姓名： | 王煦漫 张彩宁 古宏晨 |
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| 作者单位： | 西安工程大学纺织与材料学院,西安,710048;上海交通大学微纳科学技术研究院,上海,200030 |
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| 摘 要： | 采用共沉淀法制备了3种不同粒径的Fe3O4纳米粒子,并分别将其分散在水中制备成磁流体.采用超导量子干涉仪分别测量了不同粒径磁粒子及其磁流体的磁性能.实验结果显示:粉末状Fe3O4粒子的比饱和磁化强度和矫顽力均随粒径的增加而增大;磁流体中的磁粒子比饱和磁化强度也随着粒径的增加而增大,但3种样品的矫顽力均为零,显示出超顺磁性;相同粒径的Fe3O4粒子,在磁流体中的比饱和磁化强度较粉末状态时为低.
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| 关 键 词： | Fe3O4 磁性能 磁流体 纳米粒子 |
Preparation of Fe_3O_4 magnetite fluids and their magnetic properties |
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| Wang Xuman,Zhang Caining,Gu Hongchen. Preparation of Fe_3O_4 magnetite fluids and their magnetic properties[J]. New Chemical Materials, 2009, 37(1) |
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| Authors: | Wang Xuman Zhang Caining Gu Hongchen |
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| Affiliation: | 1.Textile and Material College;Xi'an Polytechnic University;Xi'an 710048;2.Institute of Micro and Nano Science and Technology;Shanghai Jiaotong University;Shanghai 200030 |
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| Abstract: | Magnetite particles with three average diameters were prepared by the method of co-precipitation.Three water-based magnetic fluids were prepared by dispersing these particles into water.The magnetic properties of the magnetic fluids were determined by SQUID.The experimental results demonstrated that specific magnetization and coercive force of the magnetite particles increased with the enhancement of diameters.The specific magnetization of magnetite particles in water also increased with the increasing of d... |
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| Keywords: | Fe3O4 |
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