Synthesis of A12O3 Nanoparticles from Local Bauxite for Water- A12O3 Nanofluids egy

International Conference on Advances in Nuclear Science and Engineering 2015

Syarif, Dani Gustaman^1 ; Prajitno, Djoko Hadi^1 ; Umar, Efrizon^1

Center for Applied Nuclear Science and Technology (PSTNT), National Nuclear Energy Agency (BATAN), Jl. Tamansari 71, Bandung

40132, Indonesia^1

关键词: Debye-Scherrer method;    Gamma alumina;    Nanofluids;    Neutral pH;    Nuclear application;    Surface area;    Synthesis and characterizations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/799/1/012014/pdf
DOI  :  10.1088/1742-6596/799/1/012014

来源: IOP

【 摘 要 】

A study on synthesis and characterization of Al2O3nanoparticles from bauxite for water-Al2O3nanofluids as an alternative coolant for nuclear and non-nuclear applications has been done. The Al2O3nanoparticles were synthesized by heating AlOOH as a precursor derived from local bauxite. The Al2O3nanoparticles were dispersed in water and ultrasonicated to produce nanofluids. XRD data showed that the Al2O3nanoparticles crystallized in gamma alumina with crystallite size of 4.5 nm (Debye Scherrer method). Surface area of the Al2O3nanoparticles was 195 m2/gram. Data of TEM showed that the particle size was smaller than 10 nm. According to zeta potential data, the nanofluids were stable at neutral pH of 7.3 with zeta potential of 28-51 mV. The height of the nanofluid surface decreased about 13 % after 6 days. In addition, the CHF of the water-Al2O3nanofluids produced in this study increased about 55-161 % compared to that of water.