Piezoresponse and microstructure of BaTaO2N ceramics
| Autor: | Takeshi Shibahara, Yuji Masubuchi, Shinichi Kikkawa, Yuki Nagamine, Akira Hosono |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Electrically conductive Biasing 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences 0104 chemical sciences Piezoresponse force microscopy visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Wafer Ceramic Composite material 0210 nano-technology Porosity Perovskite (structure) |
| Zdroj: | Journal of the European Ceramic Society. 38:3478-3482 |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/j.jeurceramsoc.2018.04.001 |
| Popis: | Piezoresponse force microscopy was conducted on a polished slice of the perovskite oxynitride ceramic BaTaO2N after ammonolysis at a bias voltage of ± 10 V. The ceramic surface was relatively porous because it was readily hydrolyzed by ambient humidity. While there was no piezoresponse on the surface of the ultrathin slice, a piezoresponse was clearly observed just below the surface of a thick slice. The response was enhanced in a denser sample. It increased with measuring voltage up to 7 V, and then gradually decreased up to 9 V. The response also gradually decreased with time but persisted even after 150 min at a measuring voltage of 6 V. Microstructural characterization revealed well-sintered grains, about 100 nm in size, in a relatively dense BaTaO2N structure. High-porosity BaTaO2N did not show any piezoresponse because its porous surface was easily hydrolyzed. A weak piezoresponse was observed for an electrically conductive slice obtained from deep inside a relatively dense BaTaO2N ceramic after ammonolysis. |
| Databáze: | OpenAIRE |
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