Ultrasonic cavitation for obtainment of nanometric sized particles

3rd International Meeting for Researchers in Materials and Plasma Technology; 1st Symposium on Nanoscience and Nanotechnology

物理学;材料科学

Santos, A.^1 ; Guzmán, R.^1 ; Espinosa, J.^1 ; Estrada, J.^1

Universidad Pontificia Bolivariana Seccional Bucaramanga, Floridablanca, Colombia^1

关键词: Aluminium oxide;    Elemental compositions;    Nanometric size;    Nanometric size particles;    Particles sizes;    Physical principles;    Titanium dioxides (TiO2);    Ultrasonic cavitation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/687/1/012035/pdf
DOI  :  10.1088/1742-6596/687/1/012035

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

This project aims to determine the possibility of obtaining nanometric size particles of aluminium oxide (Al2O3) and titanium dioxide (TiO2) from commercial micron-sized powders, through the physical principle of ultrasonic cavitation, in order to be used as supply material in coatings made through a process of thermal spray by flame. The tests are performed on a Hielscher UIP 1000hd Ultrasonics equipment, in a 20 micron wave amplitude and in times of 6, 8, 12, 18 and 24 hours. The determination of the particle size is done through image processing using ImageJ software, obtained by the technique of scanning electron microscopy (SEM); while the elemental composition of the processed samples is analyzed through the technique of energy dispersing spectroscopy (EDS). The results show that Al2O3 and TiO2 have a reduction behaviour of the particles size after being subjected to ultrasonic cavitation, however is only reached the nanometric size in the TiO2 samples.