Exploration of β-Ga2O3 Ceramics Synthesized via Solid-State Method

Abstract

β-Ga2O3 ceramic was synthesized using the solid-state method, a well-established technique for creating ce ramic materials with controlled composition and structure. The process began by pressing gallium oxide (Ga2O3) powder into a unified form, ensuring even distribution and compactness of the material. This pressed form was then subjected to annealing at 1400 °C for 10 hours, a critical step facilitating the formation of a stable and crystalline β-Ga O phase. Energy dispersive X-ray analysis (EDS) was employed to investigate the elemental composition of the synthesized β-Ga2O3ceramic. The analysis confirmed that the material closely adhered to the ideal stoichiometric ratio of oxygen to gallium (O/Ga) at 3:2, ensuring the purity and consistency of the ceramic. The optical properties of the β-Ga2O3 ceramics were thoroughly studied. Surface morphology analysis and elemental composition measurements were complemented by the recording of pho toluminescence excitation and transmission spectra at successive wavelengths ranging from 200 to 800 nm. These spectra provided valuable insights into the material’s electronic and optical behavior. Both the synthe sized β-Ga2O3ceramic and commercial β-Ga2O3 crystals exhibited distinct photoluminescence peaks in the blue (~2.7 eV) and ultraviolet (3.3, 3.4, 3.8 eV) spectral ranges.