High temperature electromechanical properties of calcium bismuth niobate (CaBi2Nb2O9) piezoelectric ceramics

WANG Chunming; GUO Zhen-Lei; ZHAO Tian-Long; YU Si-Long

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High temperature electromechanical properties of calcium bismuth niobate (CaBi2Nb2O9) piezoelectric ceramics

WANG Chunming * #,GUO Zhen-Lei,ZHAO Tian-Long,YU Si-Long

School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China

*Correspondence author

#Submitted by

Subject:

Funding: Outstanding Youth Scientist Research Foundation of Shandong Province of China （No.No. 2008BS04002）, Natural Science Foundation of Shandong Province of China （No.No. ZR2009FQ009）, Specialized Research Fund for the Doctoral Program of Higher Education of China （No.No. 20080422003）

Opened online:17 February 2012

Accepted by: none

Citation: WANG Chunming,GUO Zhen-Lei,ZHAO Tian-Long.High temperature electromechanical properties of calcium bismuth niobate (CaBi2Nb2O9) piezoelectric ceramics[OL]. [17 February 2012] http://en.paper.edu.cn/en_releasepaper/content/4464603

The dielectric, piezoelectric and electromechanical properties of (LiCe) modified CaBi2Nb2O9 (CBN) bismuth layer-structured ferroelectric ceramics were investigated. The piezoelectric activity and electromechanical properties of CBN ceramics were significantly improved by (LiCe) modification. The piezoelectric coefficient d33, Curie temperature Tc, electromechanical coupling factors (kp and kt), and mechanical quality factors (Qmp and Qmt), for the CBN ceramics modified with 0.10 mol% (LiCe) were found to be 16 pC/N, 921 oC, 10.4%, 29.6%, 14400 and 5700 respectively. The excellent dielectric and electromechanical spectra, together with its high piezoelectric activities and high Curie temperature (>900 oC), demonstrated the potential of (LiCe) modified CBN ceramics for ultrahigh temperature sensing applications.

Keywords:Bismuth layer-structured ferroelectrics; Piezoelectric ceramics; Calcium bismuth niobate (CaBi2Nb2O9)

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