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油基纳米Fe3O4磁性流体的稳定性和流变特性 被引量:1

STABILITY AND RHEOLOGICAL PROPERTIES OF OIL-BASED MAGNETIC FLUID
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摘要 采用一步法制备高稳定的油基 Fe_3O_4磁性流体。Fe_3O_4磁性纳米粒呈反尖晶石型、平均粒径为10~15nm。磁性流体的磁性强,磁化率为6.5×10^(-4),饱和磁化强度为21 emu/g。测定了磁性流体在重力场、磁场、以及高温下的稳定性,以及在外加磁场下的流变特性。结果表明该磁性流体具有良好的稳定性,其流变特性可以用 Herschel-Bulkley 模型描述。 Super stable oil-based magnetic fluid was prepared by a one - step method . Inverse spinel magnetic nanoparticles with a mean diameter of 10 - 15 nm were obtained. The susceptibility and the saturation magnetization of the magnetic fluid was 6.5×10^-4 and 21 emu/g, respectively. The mag- netic fluid showed excellent stability under gravity, magnetic field and high temperature. The theo- logical properties can be changed obviously under applied magnet field and can be described using the Herschel-Bulkley model.
出处 《精细石油化工》 CAS CSCD 北大核心 2008年第5期27-31,共5页 Speciality Petrochemicals
基金 国家自然科学基金(编号:20876100,20476065,20736004) 中科院过程所多相反应与复杂系统国家重点实验室基金(编号:2006-5) 中科院煤化所煤转化国家重点实验室基金(编号:2006-902) 南京医科大学研发基金(NY0586)
关键词 磁性流体 纳米粒 表面改性 流变 稳定性 四氧化三铁 Magnetic fluid nanoparticle surface modification theology stability magnetic nanoparticle
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参考文献10

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共引文献7

同被引文献31

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