Title

Dielectric and electromechanical properties of rare earth calcium oxyborate piezoelectric crystals at high temperatures

RIS ID

107536

Publication Details

Yu, F., Zhang, S., Zhao, X., Yuan, D., Qin, L., Wang, Q. & Shrout, T. R. (2011). Dielectric and electromechanical properties of rare earth calcium oxyborate piezoelectric crystals at high temperatures. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 58 (4), 868-873.

Abstract

The electrical resistivity, dielectric, and electromechanical properties of ReCa4O(BO3)3 (ReCOB; Re = Er, Y, Gd, Sm, Nd, Pr, and La) piezoelectric crystals were investigated as a function of temperature up to 1000°C. Of the studied crystals, ErCOB and YCOB were found to possess extremely high resistivity (ρ): ρ > 3 x 10 7 Ω·cm at 1000°C. The property variation in ReCOB crystals is discussed with respect to their disordered structure. The highest electromechanical coupling factor k26 and piezoelectric coefficient d26 at 1000°C, were achieved in PrCOB crystals, with values being on the order of 24.7% and 13.1 pC/N, respectively. The high thermal stability of the electromechanical properties, with variation less than 25%, together with the low dielectric loss (1500) at elevated temperatures of 1000°C, make ErCOB, YCOB, and GdCOB crystals promising for ultrahigh temperature electromechanical applications. 2006 IEEE.

Please refer to publisher version or contact your library.

Share

COinS
 

Link to publisher version (DOI)

http://dx.doi.org/10.1109/TUFFC.2011.1881