ABSTRACT. The objective of the paper has been given on the observations based on the studies on aluminum oxide (Al 2 O 3 ) powder or alumina for different time grinding. A discussion about simple and low cost preparation of Al 2 O 3 powder by (Mini Mill 2 Panalytical) and preparation of the sample was rotating at 0, 5,10 and 15 min and in the case of grinding of samples at high speed 659 rpm. Structure and morphology of aluminum oxide (Al 2 O 3 ) powder its characterizations (XRD (Model: Panalytical Empyrean) and STM (Model: NTMDT Solver Nano.)) are studied in this research paper.