Characteristics of Water-ZrO₂ Nanofluids with Different pH Utilizing Local ZrO₂ Nanoparticle Prepared by Precipitation Method

Abstract:

Changing water as the conventional nuclear reactor coolant with nanofluid in order to increase the efficiency of heat transfer in the nuclear reactors becomes a strong need. In this work, a study of synthesis and characterization of ZrO₂ nanoparticle and water-ZrO₂ nanofluid was done. The ZrO₂ nanopowder was synthesized using a precipitation method from ZrOCl₂.8H₂O (ZOC) that was prepared from local zircon (ZrSiO₄) using caustic fusion method with calcination temperature of 800°C. The ZrO₂ nanoparticle contained two phases namely cubic and monoclinic with crystallite size of 12 nm measured using Debye Scherrer method. Stability of nanofluids that prepared by mixing the ZrO₂ nanoparticle with water depended on pH. The nanofluids with pH less than 5 and larger than 8 were stable. Sedimentation test showed that the Water-ZrO₂ nanofluid produced in this study was very stable until at least 9 days. A typical basic nanofluid has zeta potential of about-41 mV and a typical acidic one has zeta potential of +45 mV. Thermal conductivity of the nanofluids was 4-9 % larger than that of water.

• Periodical: Advanced Materials Research (Volume 896)
• Pages: 163-167
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.896.163
• Online since: February 2014
• Authors: Dani Gustaman Syarif*
• Keywords: Nanofluid, Nanoparticle, pH, Precipitation, Zircon, Zro₂

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