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Experimental investigation on heat transfer rate of Co–Mn ferrofluids in external magnetic field

Materials Science-Poland
Volume 34 (2016): Issue 2 (June 2016)
By:
Open Access
|May 2016

Figures & Tables

Fig. 1

Schematic setup for the investigation of heat transfer rate of Co–Mn ferrofluids in external magnetic field.
Schematic setup for the investigation of heat transfer rate of Co–Mn ferrofluids in external magnetic field.

Fig. 2

Indexed X-ray diffraction patterns of (a) CoFe2O4, (b) Co0.7Mn0.3Fe2O4, (c) Co0.5Mn0.5Fe2O4, (d) Co0.3Mn0.7Fe2O4 and (e) MnFe2O4.
Indexed X-ray diffraction patterns of (a) CoFe2O4, (b) Co0.7Mn0.3Fe2O4, (c) Co0.5Mn0.5Fe2O4, (d) Co0.3Mn0.7Fe2O4 and (e) MnFe2O4.

Fig. 3

Magnetization curves of CoFe2O4, Co0.7Mn0.3Fe2O4, Co0.5Mn0.5Fe2O4, Co0.3Mn0.7Fe2O4 and MnFe2O4 at room temperature.
Magnetization curves of CoFe2O4, Co0.7Mn0.3Fe2O4, Co0.5Mn0.5Fe2O4, Co0.3Mn0.7Fe2O4 and MnFe2O4 at room temperature.

Fig. 4

SEM images of manganese substituted CoFe2O4 nanoparticles.
SEM images of manganese substituted CoFe2O4 nanoparticles.

Fig. 5

(a) TG and (b) DTA results of manganese substituted CoFe2O4 nanoparticles with x = 0.0, 0.3 and 0.5.
(a) TG and (b) DTA results of manganese substituted CoFe2O4 nanoparticles with x = 0.0, 0.3 and 0.5.

Fig. 6

Heat transfer rate of transformer oil based CoFe2O4 ferrofluid at an applied external magnetic fields for I = 1.8 A and 2.7 A.
Heat transfer rate of transformer oil based CoFe2O4 ferrofluid at an applied external magnetic fields for I = 1.8 A and 2.7 A.

Fig. 7

Heat transfer rate of transformer oil based Co0:5Mn0:5 Fe2O4 ferrofluid at an applied external magnetic fields for I = 1.8 A and 2.7 A.
Heat transfer rate of transformer oil based Co0:5Mn0:5 Fe2O4 ferrofluid at an applied external magnetic fields for I = 1.8 A and 2.7 A.

Fig. 8

Heat transfer rate of transformer oil based MnFe2O4 ferrofluid at an applied external magnetic fields for I = 1.8 A and 2.7 A.
Heat transfer rate of transformer oil based MnFe2O4 ferrofluid at an applied external magnetic fields for I = 1.8 A and 2.7 A.

Summary of lattice constant values [ Å] for Co1–xMnxFe2O4 with x varying from 0_0, 0_3, 0_5, 0_7 and 1_0_

NoSampleLattice constant [Å]
1CoFe2O48.397
2Co0.7Mn0.3Fe2O48.424
3Co0.5Mn0.5Fe2O4 8.421
4Co0.3Mn0.7Fe2O48.466
5MnFe2O48.493
DOI: https://doi.org/10.1515/msp-2016-0048 | Journal eISSN: 2083-134X | Journal ISSN: 2083-1331
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Language: English
Page range: 427 - 436
Submitted on: Nov 25, 2015
Accepted on: Feb 28, 2016
Published on: May 24, 2016
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
magnetic nanoparticles,
coprecipitation,
magnetic fluids,
rate of heat transfer,
carrier fluid
Related subjects:
Materials sciences,
Materials sciences, other,
Nanomaterials,
Functional and smart materials,
Materials characterization and properties

© 2016 M. Margabandhu, S. Sendhilnathan, S. Senthilkumar, K. Hirthna, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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