Morphological studies of single crystal Alumina fabricated by wet milling method

Abstract

A wet milling process was used as a novel method to fabricate the single crystal alumina. To fabricate the most thermodynamically stable form of alumina i.e., α-Al₂O₃, slurry method has been used here. α-Al₂O₃ has the widest band gap ～8.8eV which makes it more valuable in the electronic device world for use as a perfect insulator. Further to confirm the surface morphology of the prepared α-Al₂O₃ sample, scanning electronic microscopy (SEM) has been done. The prepared α-Al₂O₃sample was characterized by different characterization techniques to check the present phase of the surface of the prepared α-Al₂O₃ sample, using X-Ray diffraction pattern, Fourier transform infra-red (FTIR) spectroscopy and Photoluminescence spectroscopy (PL). Raman spectroscopy of prepared α-Al₂O₃ has also been done to understand the behavior at microscopic level and also to confirm the purity of the single crystal α-Al₂O₃ sample. All the characterizations has been done at room temperature i.e., at 300K.

Keywords: Raman spectromicroscopy, Luminescent, Slurry, Wet milling process