血小板状钡锶铁氧体纳米颗粒铁磁流体在不同胶体中的磁粘度

DAE SOLID STATE PHYSICS SYMPOSIUM 2018 Pub Date : 2019-07-12 DOI:10.1063/1.5112992

N. Gautam, Rajender Singh

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摘要

本文研究了水基和石蜡油基钡锶铁氧体铁氧体流体流动特性的磁响应。血小板颗粒在铁磁流体中起着微小圆盘的作用，这些铁磁流体是在磁场作用下获得较好流动控制的有前途的流体。采用水热法合成了Ba0.8Sr0.2Fe12O19(BSM)组成的纳米颗粒。从血小板颗粒的x射线衍射图中观察到单相磁铅石结构。在场发射电镜和透射电镜显微图上可见厚度为5 ~ 7nm，尺寸为50 ~ 250nm的六角形圆盘。磁化图显示了纳米颗粒的铁磁性。在低场范围内，由于铁磁流体中悬浮液的链式形成，磁黏度表现出较大的变化。在外加磁场作用下，流动曲线随剪切速率呈幂律变化。本文研究了水基和石蜡油基钡锶铁氧体铁氧体流体流动特性的磁响应。血小板颗粒在铁磁流体中起着微小圆盘的作用，这些铁磁流体是在磁场作用下获得较好流动控制的有前途的流体。采用水热法合成了Ba0.8Sr0.2Fe12O19(BSM)组成的纳米颗粒。从血小板颗粒的x射线衍射图中观察到单相磁铅石结构。在场发射电镜和透射电镜显微图上可见厚度为5 ~ 7nm，尺寸为50 ~ 250nm的六角形圆盘。磁化图显示了纳米颗粒的铁磁性。在低场范围内，由于铁磁流体中悬浮液的链式形成，磁黏度表现出较大的变化。在外加磁场作用下，流动曲线随剪切速率呈幂律变化。

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Magneto-viscosity of platelet shaped Ba-Sr ferrite nanoparticles based ferrofluid in different colloids

In this work, we present the magnetic response of the flow properties of water based and paraffin oil based Ba-Sr ferrite ferrofluids. The platelet particles act as tiny magnetic discs in the ferrofluids and these ferrofluids are promising fluids for obtaining the better flow control in the presence of magnetic field. The nanoparticles of composition of Ba0.8Sr0.2Fe12O19(BSM) were synthesized by hydrothermal synthesis. The single phase magnetoplumbite structure is observed from the X-ray diffraction pattern of the platelet particles. The hexagonal disc of 5 to 7 nm thickness and 50 to 250 nm in size are seen in the field emission electron microscope and transmission electron microscope micrographs. The magnetization plots show ferromagnetic behavior of the nanoparticles. The magneto-viscosity show high variation in the low field range due to the chain formation of the suspensions in the ferrofluid. The flow curves exhibit power law variation with shear rate at applied magnetic fields.In this work, we present the magnetic response of the flow properties of water based and paraffin oil based Ba-Sr ferrite ferrofluids. The platelet particles act as tiny magnetic discs in the ferrofluids and these ferrofluids are promising fluids for obtaining the better flow control in the presence of magnetic field. The nanoparticles of composition of Ba0.8Sr0.2Fe12O19(BSM) were synthesized by hydrothermal synthesis. The single phase magnetoplumbite structure is observed from the X-ray diffraction pattern of the platelet particles. The hexagonal disc of 5 to 7 nm thickness and 50 to 250 nm in size are seen in the field emission electron microscope and transmission electron microscope micrographs. The magnetization plots show ferromagnetic behavior of the nanoparticles. The magneto-viscosity show high variation in the low field range due to the chain formation of the suspensions in the ferrofluid. The flow curves exhibit power law variation with shear rate at applied magnetic fields.

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DAE SOLID STATE PHYSICS SYMPOSIUM 2018

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