Radiation Synthesis of High-Temperature Wide-Bandgap Ceramics
Lisitsyn V. Tulegenova A. Golkovski M. Polisadova E. Lisitsyna L. Mussakhanov D. Alpyssova G.
December 2023Multidisciplinary Digital Publishing Institute (MDPI)
Micromachines
2023#14Issue 12
This paper presents the results of ceramic synthesis in the field of a powerful flux of high-energy electrons on powder mixtures. The synthesis is carried out via the direct exposure of the radiation flux to a mixture with high speed (up to 10 g/s) and efficiency without the use of any methods or means for stimulation. These synthesis qualities provide the opportunity to optimize compositions and conditions in a short time while maintaining the purity of the ceramics. The possibility of synthesizing ceramics from powders of metal oxides and fluorides (MgF2, BaF2, WO3, Ga2O3, Al2O3, Y2O3, ZrO2, MgO) and complex compounds from their stoichiometric mixtures (Y3Al3O12, Y3AlxGa(5−x) O12, MgAl2O4, ZnAl2O4, MgWO4, ZnWO4, BaxMg(2−x) F4), including activators, is demonstrated. The ceramics synthesized in the field of high-energy electron flux have a structure and luminescence properties similar to those obtained by other methods, such as thermal methods. The results of studying the processes of energy transfer of the electron beam mixture, quantitative assessments of the distribution of absorbed energy, and the dissipation of this energy are presented. The optimal conditions for beam treatment of the mixture during synthesis are determined. It is shown that the efficiency of radiation synthesis of ceramics depends on the particle dispersion of the initial powders. Powders with particle sizes of 1–10 µm, uniform for the synthesis of ceramics of complex compositions, are optimal. A hypothesis is put forward that ionization processes, resulting in the radiolysis of particles and the exchange of elements in the ion–electron plasma, dominate in the formation of new structural phases during radiation synthesis.
ceramics , high-power electron flux , luminescence , radiation synthesis , refractory dielectric materials
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Department of Materials Science, Engineering School, National Research Tomsk Polytechnic University, 30, Lenin Ave., Tomsk, 634050, Russian Federation
Institute of Applied Science & Information Technology, Almaty, 050042, Kazakhstan
National Nanotechnology Laboratory of Open Type (NNLOT), Al-Farabi Kazakh National University, 71, Al-Farabi, Ave., Almaty, 050040, Kazakhstan
Budker Institute of Nuclear Physics, SB RAS, 11, Lavrentiev Ave, Novosibirsk, 630090, Russian Federation
Department of Physics, Chemistry and Theoretical Mechanics, Tomsk State University of Architecture and Building, 2, Solyanaya Sq, Tomsk, 634003, Russian Federation
Department of Technical Physics, L.N. Gumilyov, Eurasian National University, Astana, 010000, Kazakhstan
Department of Radiophysics and Electronics, Karaganda Buketov University, Karaganda, 100028, Kazakhstan
Department of Materials Science
Institute of Applied Science & Information Technology
National Nanotechnology Laboratory of Open Type (NNLOT)
Budker Institute of Nuclear Physics
Department of Physics
Department of Technical Physics
Department of Radiophysics and Electronics
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