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Piezoelectric and electromechanical properties of ultrahigh temperature CaBi 2 Nb 2 O 9 ceramics
Author(s) -
Wang ChunMing,
Wang JinFeng,
Zhang Shujun,
Shrout Thomas R.
Publication year - 2009
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.200802259
Subject(s) - piezoelectricity , curie temperature , materials science , dielectric , ceramic , electromechanical coupling coefficient , piezoelectric coefficient , bismuth , composite material , curie , condensed matter physics , optoelectronics , metallurgy , ferromagnetism , physics
The piezoelectric, dielectric, and electromechanical properties of the (KCe) co‐substituted calcium bismuth niobate (CaBi 2 Nb 2 O 9 , CBN) were investigated. The piezoelectric activities of CBN ceramics were significantly enhanced and the dielectric loss tan δ decreased by (KCe) substitution. The Ca 0.9 (KCe) 0.05 Bi 2 Nb 2 O 9 ceramics possess the optimal piezoelectric properties, and the piezoelectric coefficient ( d 33 ), Curie temperature ( T C ), and electromechanical coupling factors ( k p and k t ) were found to be 16 pC/N, 868 °C, 8.6%, and 23.8%, respectively. The excellent dielectric and electromechanical spectra, together with the high piezoelectric activities and ultrahigh Curie temperature, make CBN ceramics promising candidates for high temperature piezoelectric applications. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)