Study of β-Ga2O3 Ceramics Synthesized under Powerful Electron Beam


Usseinov A.B. Karipbayev Z.T. Purans J. Kakimov A.B. Bakytkyzy A. Zhunusbekov A.M. Koketai T.A. Kozlovskyi A.L. Suchikova Y. Popov A.I.
November 2023Multidisciplinary Digital Publishing Institute (MDPI)

Materials
2023#16Issue 21

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.

annealing , photoluminescence , point defects , power electronic flux , synthesis , β-Ga2O3 ceramics

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Faculty of Physics and Technical Sciences, L.N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan
Institute of Solid State Physics, University of Latvia, 8 Kengaraga Str, Riga, Lv-1063, Latvia
Department of Physics and Nanotechnology, Karaganda Buketov University, Karaganda, 100028, Kazakhstan
The Department of Physics and Methods of Teaching Physics, Berdyansk State Pedagogical University, Berdyansk, 71100, Ukraine

Faculty of Physics and Technical Sciences
Institute of Solid State Physics
Department of Physics and Nanotechnology
The Department of Physics and Methods of Teaching Physics

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