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Hydrodynamic Properties of Fe3O4 Kerosene-Based Ferrofluids with Narrow Particle Size Distribution
作者姓名:张建辉  许雪飞  司明苏  周又和  薛德胜
作者单位:[1]Key laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000 [2]School of Mechatronic Engineering, Lanzhou Jiaotong University, Lanzhou 730070
基金项目:Supported by the National Natural Science Foundation of China under Grant No 10374038, and the Trans-Century Training Programme Foundation for the Talent of M0E of China.
摘    要:

关 键 词:水力性质  Fe3O4  铁磁流体  磁场粒子  磁化曲线  Bayesian定理
收稿时间:2005-04-11
修稿时间:2005-04-11

Hydrodynamic Properties of Fe3O4 Kerosene-Based Ferrofluids with Narrow Particle Size Distribution
ZHANG Jian-Hui, XU Xue-Fei, SI Ming-Su, ZHOU You-He, XUE De-Sheng.Hydrodynamic Properties of Fe3O4 Kerosene-Based Ferrofluids with Narrow Particle Size Distribution[J].Chinese Physics Letters,2005,22(11):2944-2946.
Authors:ZHANG Jian-Hui  XU Xue-Fei  SI Ming-Su  ZHOU You-He  XUE De-Sheng
Abstract:We investigate the hydrodynamic properties of Fe3O4 kerosene-based ferrofluids with narrow particle size distribution. The ferrofluids are synthesized by improving chemical coprecipitation technique. A narrow distribution of 8.6-10.8nm particle sizes is obtained from the magnetization curve with the free-form model based on the Bayesian inference theory. The fitting result is consistent with average particle size obtained from x-ray diffraction. With the increase of applied magnetic field and magnetic particle concentration, apparent viscosity of ferrofluids increases. At concentration 4.04%, the type of flow for the ferrofluid transforms from Newtonian to Bingham plastic fluid as the applied magnetic field increases.
Keywords:
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