Magneto-viscosity of hydrothermal synthesized Cu-Zn ferrite ferrofluids | Zendy

Nisha Gautam | Zendy; G. Thirupathi | Zendy; R. Singh | Zendy

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Magneto-viscosity of hydrothermal synthesized Cu-Zn ferrite ferrofluids

Author(s) -

Nisha Gautam,

G. Thirupathi,

R. Singh

Publication year - 2017

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4977759

Subject(s) - ferrofluid , materials science , superparamagnetism , nanoparticle , magnetic nanoparticles , viscosity , hydrothermal circulation , transmission electron microscopy , ferrite (magnet) , chemical engineering , magnetization , nuclear magnetic resonance , magnetic field , nanotechnology , composite material , physics , quantum mechanics , engineering

The paraffin based ferrofluids were synthesized using the oleic acid coated Cu-Zn ferrite (CZF) nanoparticles of compositions Cu0.6Zn0.4Fe2O4 (CZF1) and Cu0.4Zn0.6Fe2O4 (CZF2) synthesized by hydrothermal process. The transmission electron micrographs (TEM) show the cubic shape particles of 4 to 10 nm and 4 to 18 nm size for CZF1 and CZF2 respectively. The nanoparticles show superparamagnetic behaviour. The viscosity increases with increase in magnetic field due to the formation of long chains of magnetic nanoparticles in ferrofluid. At higher flow rate, the magnetic chains break into smaller units and arrange along the flow direction. The flow curves show power law behavior. The size of magnetic nanoparticles influences the magneto-viscosity of the ferrofluids

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