1. Experimental Investigation of Rheological Properties and Thermal Conductivity of SiO 2 –TiO 2 Composite Nanofluids Prepared by Atomic Layer Deposition.
- Author
-
Várady, Zalán István, Ba, Thong Le, Parditka, Bence, Erdélyi, Zoltán, Hernadi, Klara, Karacs, Gábor, Gróf, Gyula, and Szilágyi, Imre Miklós
- Subjects
NANOFLUIDS ,THERMAL conductivity ,ATOMIC layer deposition ,RHEOLOGY ,THERMAL properties ,ENERGY dispersive X-ray spectroscopy ,TRANSMISSION electron microscopy - Abstract
In the current research, surface-modified SiO
2 nanoparticles were used upon immersion in an applied base fluid (ethylene glycol:water = 1:1). The atomic layer deposition method (ALD) was introduced to obtain a thin layer of TiO2 to cover the surface of SiO2 particles. After the ALD modification, the TiO2 content was monitored by energy dispersive X-ray spectroscopy (EDS). Transmission electron microscopy (TEM) and FT-IR spectroscopy were applied for the particle characterization. The nanofluids contained 0.5, 1.0, and 1.5 volume% solid particles and zeta potential measurements were examined in terms of colloid stability. A rotation viscosimeter and thermal conductivity analyzer were used to study the nanofluids' rheological properties and thermal conductivity. These two parameters were investigated in the temperature range of 20 °C and 60 °C. Based on the results, the thin TiO2 coating significant impacted these parameters. [ABSTRACT FROM AUTHOR]- Published
- 2022
- Full Text
- View/download PDF