Stabilizing oxygen vacancies and promoting electrostrain in lead-free potassium niobate-based piezoelectrics over wide temperature ranges
Piezoelectric ceramics provide high strain and large driving forces in actuators. A large electrostrain can be realized by the introduction of point defects such as vacancies, interstitial defects, and substitution defects. With Mn doping, a significant increase in the reversible electrostrain from...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2024-12-01
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| Series: | Journal of Advanced Ceramics |
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| Online Access: | https://www.sciopen.com/article/10.26599/JAC.2024.9220989 |
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| _version_ | 1846100771750281216 |
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| author | Bingcheng Luo Wei Feng Suwei Dai Hongzhou Song Yunyi Wu Jie Zhang |
| author_facet | Bingcheng Luo Wei Feng Suwei Dai Hongzhou Song Yunyi Wu Jie Zhang |
| author_sort | Bingcheng Luo |
| collection | DOAJ |
| description | Piezoelectric ceramics provide high strain and large driving forces in actuators. A large electrostrain can be realized by the introduction of point defects such as vacancies, interstitial defects, and substitution defects. With Mn doping, a significant increase in the reversible electrostrain from 0.05% to 0.17% could be achieved in potassium niobite lead-free piezoelectric ceramics. The origins of the large electrostrain were analyzed via in situ X-ray diffraction (XRD) under an electric field. The electrostrain and other typical electrical properties of the samples were measured at various temperatures, which enabled the ceramics to perform under a very wide temperature range, such as −80–130 °C for the 0.5 mol% Mn-doped sample with low dielectric loss (≤ 0.02). More importantly, combined with characterizations of the defect behavior by thermally stimulated depolarization current (TSDC), the failure mechanisms of electrostrain in a high-temperature environment could be revealed, which was associated with synergistic damage to the defects caused by the electric field and high temperature. The results can provide good ideas and a basis for the design of piezoelectric materials with good electrostrain stability over a wide temperature range. |
| format | Article |
| id | doaj-art-a1d50b73f58a4f1e804a940ad491b5d0 |
| institution | Kabale University |
| issn | 2226-4108 2227-8508 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj-art-a1d50b73f58a4f1e804a940ad491b5d02024-12-29T16:07:50ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082024-12-0113121965197310.26599/JAC.2024.9220989Stabilizing oxygen vacancies and promoting electrostrain in lead-free potassium niobate-based piezoelectrics over wide temperature rangesBingcheng Luo0Wei Feng1Suwei Dai2Hongzhou Song3Yunyi Wu4Jie Zhang5College of Science, China Agricultural University, Beijing 100083, ChinaState Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, ChinaSchool of Materials Science and Technology, China University of Geosciences Beijing, Beijing 100083, ChinaInstitute of Applied Physics and Computational Mathematics, Beijing 100094, ChinaResearch Center for Comprehensive Energy Technology, CTG Science and Technology Research Institute, Beijing 100038, ChinaResearch Center for Metamaterials, Wuzhen Laboratory, Jiaxing 314500, ChinaPiezoelectric ceramics provide high strain and large driving forces in actuators. A large electrostrain can be realized by the introduction of point defects such as vacancies, interstitial defects, and substitution defects. With Mn doping, a significant increase in the reversible electrostrain from 0.05% to 0.17% could be achieved in potassium niobite lead-free piezoelectric ceramics. The origins of the large electrostrain were analyzed via in situ X-ray diffraction (XRD) under an electric field. The electrostrain and other typical electrical properties of the samples were measured at various temperatures, which enabled the ceramics to perform under a very wide temperature range, such as −80–130 °C for the 0.5 mol% Mn-doped sample with low dielectric loss (≤ 0.02). More importantly, combined with characterizations of the defect behavior by thermally stimulated depolarization current (TSDC), the failure mechanisms of electrostrain in a high-temperature environment could be revealed, which was associated with synergistic damage to the defects caused by the electric field and high temperature. The results can provide good ideas and a basis for the design of piezoelectric materials with good electrostrain stability over a wide temperature range.https://www.sciopen.com/article/10.26599/JAC.2024.9220989piezoelectric ceramiclead-freepoint defectelectrostrainthermally stimulated depolarization current (tsdc) |
| spellingShingle | Bingcheng Luo Wei Feng Suwei Dai Hongzhou Song Yunyi Wu Jie Zhang Stabilizing oxygen vacancies and promoting electrostrain in lead-free potassium niobate-based piezoelectrics over wide temperature ranges Journal of Advanced Ceramics piezoelectric ceramic lead-free point defect electrostrain thermally stimulated depolarization current (tsdc) |
| title | Stabilizing oxygen vacancies and promoting electrostrain in lead-free potassium niobate-based piezoelectrics over wide temperature ranges |
| title_full | Stabilizing oxygen vacancies and promoting electrostrain in lead-free potassium niobate-based piezoelectrics over wide temperature ranges |
| title_fullStr | Stabilizing oxygen vacancies and promoting electrostrain in lead-free potassium niobate-based piezoelectrics over wide temperature ranges |
| title_full_unstemmed | Stabilizing oxygen vacancies and promoting electrostrain in lead-free potassium niobate-based piezoelectrics over wide temperature ranges |
| title_short | Stabilizing oxygen vacancies and promoting electrostrain in lead-free potassium niobate-based piezoelectrics over wide temperature ranges |
| title_sort | stabilizing oxygen vacancies and promoting electrostrain in lead free potassium niobate based piezoelectrics over wide temperature ranges |
| topic | piezoelectric ceramic lead-free point defect electrostrain thermally stimulated depolarization current (tsdc) |
| url | https://www.sciopen.com/article/10.26599/JAC.2024.9220989 |
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