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- Title
Development of hard high-temperature piezoelectric ceramics for actuator applications.
- Authors
Liu, Xiaolian; Wang, Guodong; Li, Meiya; Chen, Jianguo; Dong, Shuxiang; Hu, Zhongqiang
- Abstract
Piezoelectric 0.365BiScO-0.635PbTiO (BSPT) ceramics are promising for high temperature actuator applications due to their high Curie temperature and high piezoelectric coefficient. However, relatively low mechanical quality factor (Q ≈ 25) and high dielectric loss (tan δ ≈ 0.04) would lead to self-heating and property degradation if BSPT ceramics are used in piezoelectric actuators that work at resonant frequency. In this work, Mn-doped BSPT ceramics were prepared by conventional solid state reaction to modify the electrical properties. Excellent hard piezoelectric properties of d ≈ 200 pC/N, Q ≈ 210, and tan δ ≈ 0.015 were measured in the BSPT ceramics doped with 1.2 wt% of Mn. Further, Mn-doped BSPT ceramics showed a depoling temperature of 360 °C, about 100 °C higher than that of commercialized hard PZT ceramics. These results indicate that piezoelectric actuators fabricated with Mn-doped BSPT ceramics would exhibit enhanced thermal stability and higher energy efficiency in a wide temperature range.
- Subjects
PIEZOELECTRIC ceramics; HIGH temperatures; ACTUATORS; CURIE temperature; SOLID state detectors
- Publication
Journal of Materials Science: Materials in Electronics, 2015, Vol 26, Issue 12, p9350
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-015-3075-3