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Indexed by:期刊论文

Date of Publication:2017-01-01

Journal:SOLID STATE SCIENCES

Included Journals:SCIE、EI

Volume:63

Page Number:70-75

ISSN No.:1293-2558

Key Words:Magnesium ferrite (MgFe2O4); Nanocrystal clusters; Solvothermal; Magnetorheological fluid; Sedimentation stability

Abstract:In this study, magnesium ferrite (MgFe2O4) nanocrystal clusters were synthesized using an ascorbic acid assistant solvothermal method and evaluated as a candidate for magnetorheological (MR) fluid. The morphology, microstructure and magnetic properties of the MgFe2O4 nanocrystal clusters were investigated in detail by field emission scanning electron microscopy (FESEM), transmission electron microscope (TEM), thermogravimetric analyzer (TGA), X-ray diffraction (XRD) and superconducting quantum interference device (SQUID). The MgFe2O4 nanocrystal clusters were suspended in silicone oil to prepare MR fluid and the MR properties were tested using a Physica MCR301 rheometer fitted with a magnetorheological module. The prepared MR fluid showed typical Bingham plastic behavior, changing from a liquid-like to a solid -like structure under an external magnetic field. Compared with the conventional carbonyl iron particles, MgFe2O4 nanocrystal clusters-based MR fluid demonstrated enhanced sedimentation stability due to the reduced mismatch in density between the particles and the carrier medium. In summary, the as-prepared MgFe2O4 nanocrystal clusters are regarded as a promising candidate for MR fluid with enhanced sedimentation stability.(C) 2016 Elsevier Masson SAS. All rights reserved.