Fabrication, Characterization and Thermo-physical Property Evaluation of SiCNanofluids for Heat Transfer Applications
2014 (English)In: Nano-Micro Letters, ISSN 2150-5551, Vol. 6, no 2, 178-189 p.Article in journal (Refereed) Published
Nanofluids (NFs) are nanotechnology-based colloidal suspensions fabricated by suspending nanoparticles (NPs) in a base liquid. These fluids have shown potential to improve the heat transfer properties of conventional heat transfer fluids. In this study we report in detail on the fabrication, characterization and thermo-physical property evaluation of SiC NFs, prepared using SiC NPs with different crystal structure, for heat transfer applications. For this purpose, a series of SiC NFs containing SiC NPs with different crystal structure (α-SiC and β-SiC) were fabricated in a water (W)/ethylene glycol (EG) mixture (50/50 wt % ratio). Physicochemical properties of NPs/NFs were characterized by using various techniques such as powder X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Fourier Transform Infrared Spectroscopy (FTIR), Dynamic Light Scattering (DLS) and Zeta Potential Analysis were performed. Thermo-physical properties including thermal conductivity (TC) and viscosity for NFs containing SiC particles (α- and β- phase) were measured. The results showed among all suspensions, NF fabricated with α-SiC particles have more favorable thermo-physical properties compared to the NFs fabricated with β-SiC; the observed difference was attributed to combination of several factors, including crystal structure (β- vs. α-), sample purity, and residual chemicals exhibited on SiC nanoparticles. A TC enhancement of ~20% while 14% increased viscosity were obtained for a NF containing 9wt% of particular type of α-SiC NPs indicating promising capability of these kind of NFs for further heat transfer characteristics investigations.
Place, publisher, year, edition, pages
2014. Vol. 6, no 2, 178-189 p.
SiC nanoparticles, Nanofluids, Thermal conductivity, Viscosity, Thermo-physical property
Engineering and Technology
Research subject SRA - Energy
IdentifiersURN: urn:nbn:se:kth:diva-144271DOI: 10.5101/nml.v6i2.p178-189ISI: 000337033300010ScopusID: 2-s2.0-84958743111OAI: oai:DiVA.org:kth-144271DiVA: diva2:712515
FunderSwedish Research Council
QC 201404162014-04-152014-04-152014-07-03Bibliographically approved