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

• Published in: Refractories and industrial ceramics Vol. 59; no. 6; pp. 616 - 622
• Main Authors: Kiiko, V. S., Pavlov, A. V., Bykov, V. A.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.03.2019; Springer; Springer Nature B.V
• Subjects: Casting; Casting (Metal); Ceramic powders; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composites; Electric properties; Glass; Ionizing radiation; Materials Science; Microwaves; Nanocrystals; Natural Materials; Powders (Particulate matter); Radiation (Physics); Slip casting; Thermal conductivity; Thermal diffusivity; Thermal properties; Thermophysical properties; Titanium dioxide; ceramics; microwave radiation; composite (BeO + TiO; powder; thermophysical properties; nanocrystalline TiO
• ISSN: 1083-4877; 1573-9139
• DOI: 10.1007/s11148-019-00284-3

A slip casting method was used to produce samples of BeO-based composite ceramics with additions of 5 – 30 wt.% of nanocrystalline TiO 2 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 + TiO 2 )-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 + TiO 2 )-ceramics.