Dielectric spectroscopy of aluminum oxide (γ-Al2O3)

DOI: 10.48129/kjs.12885

Abstract

Aluminum oxide (Al₂O₃) are continuously demonstrating the functional characteristics in devices. The physiochemical properties of hydrothermally as-grown Aluminum oxide (Al₂O₃) have been investigated in this research article. The as-prepared material was confirmed as γ- phase formation of Al₂O₃. The average crystallite size was found ∼ 78 nm, whereas the particles were found in nano scale too. Moreover, the absence of impurity in EDS analysis, and the presence of the bending vibrations of Al-O-Al and Al-O band in FTIR characterization further confirmed the absence of impurity in the material. Evaluated dielectric properties such as a relatively high dielectric constant, and low dielectric loss indicated the good optical quality of γ- Al₂O₃. Impedance and modulus spectroscopic studies showed the non-Debye type relaxation in γ- Al₂O₃ with an average relaxation time of 5.8 µs. Overall, the dielectric spectroscopy analysis of γ- Al₂O₃ indicates the promising applications of γ- Al₂O_3­ in devices as dielectrics.