Characterization of ZnWO4, MgWO4, and CaWO4 Ceramics Synthesized in the Field of a Powerful Radiation Flux


Alpyssova G. Lisitsyn V. Bakiyeva Z. Chakin I. Kaneva E. Afanasyev D. Tussupbekova A. Vaganov V. Tulegenova A.T. Tuleuov S.
September 2024Multidisciplinary Digital Publishing Institute (MDPI)

Ceramics
2024#7Issue 31085 - 1099 pp.

This paper presents the results of a study on the morphology, structure, and luminescent properties of ceramics synthesized in the radiation field of MeWO4 compositions (where Me is Mg, Ca, and Zn). The synthesis of ceramics was carried out by the direct action of the electron flux on an initial mixture of powders of the given stoichiometric composition. WO3, ZnO, MgO, and CaO powders with particle sizes in the range of 1–50 microns were used for the synthesis of the samples. It was found that the yield of the radiation synthesis reaction (the ratio of the mass of the sample and the charge used), when treated with an electron flux with an energy of 1.4 MeV and a flux power density of 15–18 kW/cm2, was in the range of 75–99%. The synthesis of all compositions was carried out under the same radiation treatment modes, although the melting temperatures of the starting materials varied significantly and ranged from 1473 °C (WO3) to 2825 °C (MgO). The study of the ceramic structure showed that under the radiation effect of powerful radiation fluxes on the charge, a crystalline phase of the appropriate composition formed, regardless of the synthesis modes. The results of XRD studies show that during the radiation treatment of the charge, ceramics are formed mainly with the crystalline phases ZnWO4, MgWO4, and CaWO4. These resulting MeWO4 ceramics can be used for the same purposes as crystals. Photoluminescence (PL) and cathodoluminescence (CL) were studied under excitation using stationary ultraviolet radiation and nanosecond pulses of electron flux. In general, the PL and CL of synthesized ceramic samples ZnWO4, MgWO4, and CaWO4 showed that their luminescent properties are similar to those of luminescence in corresponding crystalline materials. This indicates the formation of a crystalline phase in synthesized ceramic samples.

cathodoluminescence , ceramic , electron flux , metal tungstate , photoluminescence , radiation synthesis

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Department of Radiophysics and Electronics, Faculty of Physics and Technology, Karaganda University named after E.A. Buketov, Karaganda, 100024, Kazakhstan
Department of Lasers and Lighting Engineering, National Research Tomsk Polytechnic University, Tomsk, 634050, Russian Federation
Budker Institute of Nuclear Physics Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation
X-ray Analysis Laboratory, Vinogradov Institute of Geochemistry SB RAS, Irkutsk, 664033, Russian Federation
Department of Materials Science, National Research Tomsk Polytechnic University, Tomsk, 634050, Russian Federation
National Nanotechnology Laboratory, Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan

Department of Radiophysics and Electronics
Department of Lasers and Lighting Engineering
Budker Institute of Nuclear Physics Russian Academy of Sciences
X-ray Analysis Laboratory
Department of Materials Science
National Nanotechnology Laboratory

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