Ultrahigh thermal stability and piezoelectricity of lead-free KNN-based texture piezoceramics
The contradiction between high piezoelectricity and uniquely poor temperature stability generated by polymorphic phase boundary is a huge obstacle to high-performance (K, Na)NbO<sub>3</sub> -based ceramics entering the application market as Pb-based substitutes. We possess the phase boundary by mimicking Pb(Zr, Ti)O<sub>3</sub>'s morphotropic phase boundary structure via the synergistic optimization of diffusion phase boundary and crystal orientation in 0.94(Na<sub>0.56</sub>K<sub>0.44</sub>)NbO<sub>3</sub>-0.03Bi<sub>0.5</sub>Na<sub>0.5</sub>ZrO<sub>3</sub>-0.03(Bi<sub>0.5</sub>K<sub>0.5</sub>)HfO<sub>3</sub> textured ceramics. As a result, a prominent comprehensive performance is obtained, including giant d<sub>33</sub> of 550 ± 30 pC/N and ultrahigh temperature stability (d<sub>33</sub> change rate less than 1.2% within 25-150 °C), representing a significant breakthrough in lead-free piezoceramics, even surpassing the Pb-based piezoelectric ceramics. Within the same temperature range, the d<sub>33</sub> change rate of the commercial Pb(Zr, Ti)O<sub>3</sub>-5 ceramics is only about 10%, and more importantly, its d<sub>33</sub> (~ 350 pC/N) is much lower than that of the (K, Na)NbO<sub>3</sub>-based ceramics in this work. This study demonstrates a strategy for constructing the phase boundary with MPB feature, settling the problem of temperature instability in (K, Na)NbO<sub>3</sub>-based ceramics.
Authors
- Jinfeng Lin (ORCID: https://orcid.org/0000-0002-6057-6007)
- Houbing Huang (ORCID: https://orcid.org/0000-0002-8006-3495)
- Jiwei Zhai (ORCID: https://orcid.org/0000-0002-0020-3524)
- Yuxuan Yang (ORCID: https://orcid.org/0000-0001-5444-4908)
- Bo Shen (ORCID: https://orcid.org/0000-0001-5802-787X)
- Xiaoming Shi (ORCID: https://orcid.org/0000-0001-7332-6835)
- Guanglong Ge (ORCID: https://orcid.org/0009-0001-1305-963X)
- Xiangdong Ding (ORCID: https://orcid.org/0000-0002-1220-3097)
- Haijun Wu (ORCID: https://orcid.org/0000-0002-7303-379X)
- Zhengqian Fu (ORCID: https://orcid.org/0000-0001-9402-9549)
- Lihui Xu (ORCID: https://orcid.org/0000-0002-2633-9999)
- Fei Li (ORCID: https://orcid.org/0000-0002-4572-0322)
- Guohui Li (ORCID: https://orcid.org/0000-0001-8223-705X)
- Yang Zhang (ORCID: https://orcid.org/0000-0002-7543-0502)
- Peng Li (ORCID: https://orcid.org/0000-0003-0418-4209)
- Jun Sun (ORCID: https://orcid.org/0000-0001-9127-088X)
- Simin Wang
- Jin Qian (ORCID: https://orcid.org/0000-0002-7674-6728)
- Zhihao Zhao (ORCID: https://orcid.org/0000-0003-2348-5752)
- Cheng Shi (ORCID: https://orcid.org/0000-0002-1299-1345)
Institutions
- Tongji University (CN)
- Beijing Institute of Technology (CN)
- Liaocheng University (CN)
- Shanghai Institute of Ceramics (CN)
- Xi'an Jiaotong University (CN)
- University of Science and Technology Beijing (CN)
Publication Details
- Journal
- Nature Communications
- Published
- 2024-10-18
- DOI
- https://doi.org/10.1038/s41467-024-53437-5
- Citations
- 54
- Primary Topic
- Ferroelectric and Piezoelectric Materials
- Type
- article
- Field-Weighted Citation Impact
- 6.33
Funders
- National Natural Science Foundation of China