Production and Thermophysical Properties of BeO Ceramics with the Addition of Nanocrystalline Titanium Dioxide

Resumo

A slip casting method was used to produce samples of BeO-based composite ceramics with additions of 5 – 30 wt.% of nanocrystalline TiO₂ powder. It was established that slip casting does not provide the maximum density of ceramic samples. This may cause some effect on its thermophysical properties. A microstructure of (BeO + TiO₂)-ceramics was studied, as well as variations in its specific heat capacity at constant pressure, thermal diffusivity and thermal conductivity depending on the amount of additive at room temperature and in the range of 300 – 800 K. The established patterns will help designing more powerful absorbers of scattered microwave radiation based on (BeO + TiO₂ )-ceramics.