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

• Autorzy: Margabandhu M. , Sendhilnathan S. , Senthilkumar S. , Hirthna K.

Identyfikatory

DOI

10.1515/msp-2016-0048

• Języki publikacji: EN

Abstrakty

EN

Manganese substituted cobalt ferrite (Co_1–xMnxFe₂O₄ with x = 0, 0.3, 0.5, 0.7 and 1) nanopowders were synthesized by chemical coprecipitation method. The synthesized magnetic nanoparticles were investigated by various characterization techniques, such as X-ray diffraction (XRD), vibrating sample magnetometry (VSM), scanning electron microscopy (SEM) and thermogravimetric and differential thermal analysis (TG/DTA). The XRD results confirmed the presence of cubic spinel structure of the prepared powders and the average crystallite size of magnetic particles ranging from 23 to 45 nm. The VSM results showed that the magnetic properties varied with an increase in substituted manganese while SEM analysis showed the change in the morphology of obtained magnetic nanoparticles. The TG/DTA analysis indicated the formation of crystalline structure of the synthesized samples. The heat transfer rate was measured in specially prepared magnetic nanofluids (nanoparticles dispersed in carrier fluid transformer oil) as a function of time and temperature in presence of external magnetic fields. The experimental analysis indicated enhanced heat transfer rate of the magnetic nanofluids which depended upon the strength of external magnetic field and chemical composition.

Słowa kluczowe

EN

magnetic nanoparticles; coprecipitation; magnetic fluids; rate of heat transfer; carrier fluid

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2016
• Tom: Vol. 34, No. 2
• Strony: 427--436
• Opis fizyczny: Bibliogr. 24 poz., rys., tab.

Twórcy

autor

Margabandhu M.

• Anna University Chennai: University College of Engineering-Ariyalur, Department of Physics, Ariyalur-621704, India

autor

Sendhilnathan S.

• Anna University Chennai: University College of Engineering-Pattukkottai, Department of Physics, Rajamadam-614701, Thanjavur, India

autor

Senthilkumar S.

• Anna University Chennai: University College of Engineering-Ariyalur, Department of EEE, Ariyalur-621704, India

autor

Hirthna K.

• Anna University Chennai: University College of Engineering-Kanchipuram, Department of Physics, Kanchipuram-631552, India

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.