TY - JOUR
T1 - Dielectric and electromechanical properties of rare earth calcium oxyborate piezoelectric crystals at high temperatures
AU - Yu, Fapeng
AU - Zhang, Shujun
AU - Zhao, Xian
AU - Yuan, Duorong
AU - Qin, Lifeng
AU - Wang, Qing Ming
AU - Shrout, Thomas R.
N1 - Funding Information:
Manuscript received december 14, 2010; accepted February 4, 2011. This work was supported by nsF under grant number Eccs09-25586 and the national nature science Foundation of china (nsFc no. 50902089). F. yu thanks the china scholarship council for their support.
PY - 2011/4
Y1 - 2011/4
N2 - 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 × 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 (<46%) and high mechanical quality factor (>1500) at elevated temperatures of 1000°C, make ErCOB, YCOB, and GdCOB crystals promising for ultrahigh temperature electromechanical applications.
AB - 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 × 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 (<46%) and high mechanical quality factor (>1500) at elevated temperatures of 1000°C, make ErCOB, YCOB, and GdCOB crystals promising for ultrahigh temperature electromechanical applications.
UR - https://www.scopus.com/pages/publications/79955396169
UR - https://www.scopus.com/pages/publications/79955396169#tab=citedBy
U2 - 10.1109/TUFFC.2011.1881
DO - 10.1109/TUFFC.2011.1881
M3 - Article
C2 - 21507766
AN - SCOPUS:79955396169
SN - 0885-3010
VL - 58
SP - 868
EP - 873
JO - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
JF - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
IS - 4
M1 - 5750110
ER -