Study of β-Ga2O3 Ceramics Synthesized under Powerful Electron Beam

Abstract

The synthesis of β-Ga2O3 ceramic was achieved using high-energy electron beams for the first time. The irradiation of gallium oxide powder in a copper crucible using a 1.4 MeV electron beam resulted in a monolithic ceramic structure, eliminating powder particles and imperfections. The synthesized β-Ga2O3 ceramic exhibited a close-to-ideal composition of O/Ga in a 3:2 ratio. X-ray diffraction analysis confirmed a monoclinic structure (space group C2/m) that matched the reference diagram before and after annealing. Photoluminescence spectra revealed multiple luminescence peaks at blue (~2.7 eV) and UV (3.3, 3.4, 3.8 eV) wavelengths for the synthesized ceramic and commercial crystals. Raman spectroscopy confirmed the bonding modes in the synthesized ceramic. The electron beam-assisted method offers a rapid and cost-effective approach for β-Ga2O3 ceramic production without requiring additional equipment or complex manipulations. This method holds promise for fabricating refractory ceramics with high melting points, both doped and undoped.

Innovations in Electric Current-Assisted Sintering for SOFC: A Review of Advances in Flash Sintering and Ultrafast High-Temperature Sintering

“…It is worth noting that, in addition to FS and UHS, a recently proposed method known as electron-beam radiation-assisted synthesis has also emerged as a new avenue for ceramic synthesis. This method uses a powerful electron beam as a heater to sinter oxide powders, with a sintering duration of just 1 s [133,134]. Electron beam-assisted synthesis technology is both economical and efficient, and it holds significant potential for development and application in the field of SOFCs.…”