Synthesis and Investigation of Properties of Beryllium Ceramics Modified with Titanium Dioxide Nanoparticles
Pavlov A. Sagdoldina Z. Zhilkashinova A. Magazov N. Turar Z. Gert S.
October 2023Multidisciplinary Digital Publishing Institute (MDPI)
Materials
2023#16Issue 19
Samples of beryllium ceramics, with the addition of micro- and nanoparticles TiO2, have been obtained by the method of thermoplastic slip casting. The microstructure of batch ceramics, consisting of micropowders and ceramics with TiO2 nanoparticles sintered at an elevated temperature, has been investigated. It was found that the introduction of TiO2 nanoparticles leads to changes in the mechanisms of mass transfer and microstructure formation, and the mobility of TiO2 at interfacial grain boundaries increases, which leads to the formation of elements of a zonal shell structure. The reduction of intergranular boundaries leads to an increase in density, hardness, and mechanical strength of ceramics. The whole complex of properties of the synthesized material, with the addition of TiO2 nanoparticles in the amount of 1.0–1.5 wt.%, leads to an increase in the ability to absorb electromagnetic radiation in the frequency range of electric current 8.2–12.4 GHz. The analysis and updating of knowledge on synthesis, and the investigation of properties of beryllium ceramics modified by nanoparticles, seems to be significant. The obtained results can be used in the creation of absorbers of scattered microwave radiation based on (BeO + TiO2) ceramics.
apparent density , beryllium oxide , microhardness , microstructure , microwave radiation , reflection losses , TiO2 nanoparticles
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Surface Engineering and Tribology Research Center, Sarsen Amanzholov East-Kazakhstan University, Ust-Kamenogorsk, 070000, Kazakhstan
National Laboratory of Collective Use, Sarsen Amanzholov East-Kazakhstan University, Ust-Kamenogorsk, 070000, Kazakhstan
Center of Excellence “VERITAS”, Daulet Serikbayev East Kazakhstan Technical University, Ust-Kamenogorsk, 070000, Kazakhstan
Surface Engineering and Tribology Research Center
National Laboratory of Collective Use
Center of Excellence “VERITAS”
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