Improvement of thermal properties of water and ethylene glycol by metallic and ceramic dispersion

5th National Conference on Processing and Characterization of Materials

Mishra, Sripooja^1 ; Chinara, Manaswini^1 ; Nuthalapati, Mohan^1 ; Basu, A.^1

Department of Metallurgical and Materials Engineering, National Institute of Technology, Rourkela, Odisha, 769008, India^1

关键词: Ceramic dispersion;    Iso-electric points;    Particle dispersion;    Particle size analyzers;    Particle size measurement;    Thermal conductivity measurements;    Top down approaches;    Visual observations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/115/1/012033/pdf
DOI  :  10.1088/1757-899X/115/1/012033

来源: IOP

【 摘 要 】

Owing to rising need for more energy efficient coolant systems, the current work focuses on synthesis of Alumina-water, Alumina-Ethylene Glycol (EG), Zirconium-water, Zirconium-Ethylene Glycol particle dispersion systems for use as quenchants, with varying volume of particles obtained using a top-down approach of 10h ball milling. Characterisation of the particles was performed using XRD analysis, also measuring the crystallite size. Particle size measurement was also undertaken by using particle size analyzer, further corroborated by SEM analysis. A zeta-potential study was carried out to obtain the iso electric point for maintaining stability. Synthesis of the dispersions at different volume % of powders were followed by thermal conductivity measurements with water and EG base fluids, with and without addition of oleic acid as a surfactant. The stability studies were performed by visual observation. From the results it was observed that Al2O3and Zr can increase conductivity of EG more prominently than water and stability of Zr based suspensions are better than Al2O3. Oleic acid did not play any positive role in these systems.