Giant Piezoelectricity of Ternary Perovskite Ceramics at High Temperatures
Abstract
Here, novel ferroelectric ceramics of (0.95 − x)BiScO3‐xPbTiO3‐0.05Pb(Sn1/3Nb2/3)O3 (BS‐xPT‐PSN) of complex perovskite structure are reported with compositions near the morphotropic phase boundary (MPB), and which exhibit a piezoelectric coefficient d33 = 555 pC N−1, a large‐signal coefficient ≈ 1200 pm V−1 at room temperature, and a high Curie temperature TC of 408 °C. More interestingly, this ternary system exhibits a giant and stable piezoelectric response at 200 °C with a large‐signal ≈ 2500 pm V−1, matching that of the costly relaxor‐based piezoelectric single crystals at room temperature. The mechanisms of such giant piezoelectricity and its characteristic temperature dependence are attributed to the spontaneous polarization rotation and extension under an electric field and the MPB‐related phase transition. The findings reveal that the BS‐xPT‐PSN ceramics constitute a new family of high‐performance piezoelectric materials suitable for electromechanical transducers that can be operated at high temperatures (at 200 °C, or higher).
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 22, 2019
- Source ID
- 10.1002/adfm.201807920
Entities
People
- Alexei A Bokov
- Chun‐lei Wang
- Chun‐ming Wang
- Hongli Wang
- Jingen Wu
- Kaiyang Zeng
- Tian‐long Zhao
- Yang Yu
- Zhaoqiang Chu
- Zuo‐guang Ye
Organizations
- Beijing Municipal Science & Technology Commission
- National Natural Science Foundation of China
- Natural Sciences and Engineering Research Council
- Office of Naval Research
- Peking University
- Shandong University
- Simon Fraser University
- Xidian University