Synthesis and Investigation of Properties of Beryllium Ceramics Modified with Titanium Dioxide Nanoparticles

Samples of beryllium ceramics, with the addition of micro- and nanoparticles TiO_2, 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.