Steady-shear magnetorheological response of fluids containing solution-combustion-synthesized Ni-Zn ferrite powder

Anupama, AV and Kumaran, V and Sahoo, B (2018) Steady-shear magnetorheological response of fluids containing solution-combustion-synthesized Ni-Zn ferrite powder. In: ADVANCED POWDER TECHNOLOGY, 29 (9). pp. 2188-2193.

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Abstract

Magnetically soft nickel-zinc ferrite (Ni0.5Zn0.5Fe2O4) powder with high saturation magnetization was synthesized by solution combustion route using metal nitrates as precursors and glycine as fuel. The particles were found to have irregular morphology. Three different concentrations of magnetorheological fluids (MRFs) were prepared by dispersing 10, 20 and 40 wt% of these particles in thin silicone oil. The behaviours of the MRFs were studied under steady shear conditions at different applied magnetic field strengths (B). The yield strength (tau(Y)) and viscosity (eta) of all the MRFs were found to increase with B and particle fill fraction phi, while the response of the MRFs was strongly influenced by the morphology, microstructure and saturation magnetization of the particles. Owing to the low density of the particles, the observed off-state viscosity is high. However, the excellent thermo-oxidative and chemical stabilities of these magnetic oxide particles than metallic magnetic particles make these MRFs dependable for applications in harsh working environments. In addition, the low cost and feasibility of large scale preparation of these magnetic oxides make these MRFs further attractive for industrial applications. (C) 2018 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.

Item Type:	Journal Article
Publication:	ADVANCED POWDER TECHNOLOGY
Publisher:	ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Additional Information:	Copyright of this article belong to ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	23 Jul 2018 15:42
Last Modified:	21 Feb 2019 09:37
URI:	http://eprints.iisc.ac.in/id/eprint/60268

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