Deterioration of the piezoelectric properties of (Bi0.5Na0.5)TiO3 when using Na2CO3 as a sintering aid: A crystallographic and microstructural study
| Autor: | Tadhg Mahon, Sybrand van der Zwaag, Dimosthenis Giannopoulos, Pim Groen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Diffraction Materials science General Physics and Astronomy Sintering 02 engineering and technology Crystal structure 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Piezoelectricity Grain size Grain growth visual_art 0103 physical sciences visual_art.visual_art_medium Ceramic Composite material 0210 nano-technology |
| Zdroj: | Journal of Applied Physics, 129(13) |
| ISSN: | 0021-8979 |
| Popis: | In this work, we present the impact of using Na2CO3 as a sintering aid and grain growth agent on the crystal structure, microstructure, and piezoelectric properties of (Bi0.5Na0.5)TiO3 ceramics. The addition of Na2CO3 leads to a substantial increase in the grain size and density even at a reduced sintering temperature of 1025 °C. However, at the same time, the value of the piezoelectric constant d33 drops dramatically. Using high-resolution x-ray diffraction analysis, we demonstrate that the decrease in piezoelectric constant is due to a change in the chemical composition of the (Bi0.5Na0.5)TiO3 base material rather than due to the change in the grain size. High Na2CO3-addition levels lead to the formation of Bi2O3 as a secondary phase during sintering too. |
| Databáze: | OpenAIRE |
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