This work was supported by NSF under grant number ECCS09-25586, NASA under grant number NNX10CA27C and Center for Dielectric Studies (CDS) of Penn State.
Piezoelectric Materials for High Temperature Sensors
Article first published online: 29 AUG 2011
© 2011 The American Ceramic Society
Journal of the American Ceramic Society
Volume 94, Issue 10, pages 3153–3170, October 2011
How to Cite
Zhang, S., Yu, F. (2011), Piezoelectric Materials for High Temperature Sensors. Journal of the American Ceramic Society, 94: 3153–3170. doi: 10.1111/j.1551-2916.2011.04792.x
- Issue published online: 4 OCT 2011
- Article first published online: 29 AUG 2011
- Manuscript Accepted: 21 JUL 2011
- Manuscript Received: 23 MAY 2011
- NSF. Grant Number: ECCS09-25586
- NASA. Grant Number: NNX10CA27C
- Center for Dielectric Studies (CDS) of Penn State
Piezoelectric materials that can function at high temperatures without failure are desired for structural health monitoring and/or nondestructive evaluation of the next generation turbines, more efficient jet engines, steam, and nuclear/electrical power plants. The operational temperature range of smart transducers is limited by the sensing capability of the piezoelectric material at elevated temperatures, increased conductivity and mechanical attenuation, variation of the piezoelectric properties with temperature. This article discusses properties relevant to sensor applications, including piezoelectric materials that are commercially available and those that are under development. Compared to ferroelectric polycrystalline materials, piezoelectric single crystals avoid domain-related aging behavior, while possessing high electrical resistivities and low losses, with excellent thermal property stability. Of particular interest is oxyborate [ReCa4O (BO3)3] single crystals for ultrahigh temperature applications (>1000°C). These crystals offer piezoelectric coefficients deff, and electromechanical coupling factors keff, on the order of 3–16 pC/N and 6%–31%, respectively, significantly higher than those values of α-quartz piezocrystals (~2 pC/N and 8%). Furthermore, the absence of phase transitions prior to their melting points ~1500°C, together with ultrahigh electrical resistivities (>106 Ω·cm at 1000°C) and thermal stability of piezoelectric properties (< 20% variations in the range of room temperature ~1000°C), allow potential operation at extreme temperature and harsh environments.