| Autor: |
Drdlik, Daniel, Marak, Vojtech, Klement, Robert, Tofel, Pavel, Drdlikova, Katarina, Hadraba, Hynek, Chlup, Zdenek |
| Zdroj: |
Boletín de la Sociedad Española de Cerámica y Vidrio; September-October 2024, Vol. 63 Issue: 5 p368-376, 9p |
| Abstrakt: |
In progressive particle or layered composites based on a combination of BaTiO3and Al2O3, serving as e.g. ceramic harvesters, new phases are formed during heat treatment. The dominant one is BaTiAl6O12. This study provides information about the microstructural, mechanical and optical properties of the BaTiAl6O12ceramics. The evolution of the phases during the solid-state reaction synthesis of the BaTiAl6O12was monitored. The fully dense samples prepared by spark plasma sintering had indentation Vickers hardness and indentation elastic modulus within ranges of 10.1–13.7GPa and 132.0–187.0GPa, depending on loading force. The three-point bending tests of the BaTiAl6O12samples resulted in flexural strength of 129.9MPa and fracture toughness of 1.8MPam1/2. The sample showed blue broad-band emission under UV excitation due to the charge-transfer transition of the Ti4+and defect sites. The BaTiAl6O12evinced low permittivity (ɛ′)=16 and dielectric loss (tanδ) <0.0003 at a frequency 1kHz. |
| Databáze: |
Supplemental Index |
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