Although the thermal conductivities and viscosities of nanofluids have been widely measured, relatively few studies concerning their electrical conductivity have been reported. Stable nanofluids consisting of palladium nanoparticles, with a mean particle size of 5.63 nm, were dispersed in distilled water with volume fractions between 0.00 and 1.00 vol%. The palladium nanoparticles were prepared using a reduction method in the presence of ultrasound waves and characterized using X-ray powder diffraction, transmission electron microscopy, and UV-Visible spectroscopy. The electrical conductivity of the nanofluids of palladium nanoparticles in distilled water was measured both as a function of palladium loading and temperature and was found to increase with increasing NP volume fraction and temperature. A 75.67 % increase in the electrical conductivity of distilled water was achieved by NP loading of 1 vol% at 25 C. It was observed that increasing temperature has a much greater effect on electrical conductivity enhancement than increasing palladium loading.

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