Polarization-dominated thermal-electric-mechanical behaviours in GaN ceramics
In this paper, we have systematically investigated the polarization-dependent thermal-electric-mechanical behaviours in GaN piezoelectric semiconductor ceramics (PSCs). A thermo-piezoelectric semiconductor model is proposed with pyroelectric and thermoelastic as well as piezoelectric couplings. It i...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
2022
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| Online Access: | http://hdl.handle.net/20.500.11937/89346 |
| _version_ | 1848765204011155456 |
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| author | Qin, G.S. Zhou, X.P. Wang, Y. Lu, Chunsheng Zhao, M.H. |
| author_facet | Qin, G.S. Zhou, X.P. Wang, Y. Lu, Chunsheng Zhao, M.H. |
| author_sort | Qin, G.S. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In this paper, we have systematically investigated the polarization-dependent thermal-electric-mechanical behaviours in GaN piezoelectric semiconductor ceramics (PSCs). A thermo-piezoelectric semiconductor model is proposed with pyroelectric and thermoelastic as well as piezoelectric couplings. It is shown that polarization has a non-negligible influence on the thermoelectric properties of GaN ceramics. Because the potential barrier caused by pyroelectricity near the hot end suppresses the Seebeck effect, the thermoelectric potential and current of polarized samples obviously decrease with temperature difference. Moreover, it is the intercoupling between pyroelectric polarization and piezoelectric charges that largely affects the bending strength of GaN ceramics. Compared with the ordinary ceramics, the electromechanical and thermoelectric properties of GaN PSCs can be dominated through polarization. |
| first_indexed | 2025-11-14T11:31:32Z |
| format | Journal Article |
| id | curtin-20.500.11937-89346 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:31:32Z |
| publishDate | 2022 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-893462022-09-30T06:20:09Z Polarization-dominated thermal-electric-mechanical behaviours in GaN ceramics Qin, G.S. Zhou, X.P. Wang, Y. Lu, Chunsheng Zhao, M.H. In this paper, we have systematically investigated the polarization-dependent thermal-electric-mechanical behaviours in GaN piezoelectric semiconductor ceramics (PSCs). A thermo-piezoelectric semiconductor model is proposed with pyroelectric and thermoelastic as well as piezoelectric couplings. It is shown that polarization has a non-negligible influence on the thermoelectric properties of GaN ceramics. Because the potential barrier caused by pyroelectricity near the hot end suppresses the Seebeck effect, the thermoelectric potential and current of polarized samples obviously decrease with temperature difference. Moreover, it is the intercoupling between pyroelectric polarization and piezoelectric charges that largely affects the bending strength of GaN ceramics. Compared with the ordinary ceramics, the electromechanical and thermoelectric properties of GaN PSCs can be dominated through polarization. 2022 Journal Article http://hdl.handle.net/20.500.11937/89346 10.1016/j.ceramint.2022.06.243 restricted |
| spellingShingle | Qin, G.S. Zhou, X.P. Wang, Y. Lu, Chunsheng Zhao, M.H. Polarization-dominated thermal-electric-mechanical behaviours in GaN ceramics |
| title | Polarization-dominated thermal-electric-mechanical behaviours in GaN ceramics |
| title_full | Polarization-dominated thermal-electric-mechanical behaviours in GaN ceramics |
| title_fullStr | Polarization-dominated thermal-electric-mechanical behaviours in GaN ceramics |
| title_full_unstemmed | Polarization-dominated thermal-electric-mechanical behaviours in GaN ceramics |
| title_short | Polarization-dominated thermal-electric-mechanical behaviours in GaN ceramics |
| title_sort | polarization-dominated thermal-electric-mechanical behaviours in gan ceramics |
| url | http://hdl.handle.net/20.500.11937/89346 |