TY - JOUR
T1 - Piezoelectric properties in (K0.5Bi0.5)TiO 3-(Na0.5Bi0.5)TiO3-BaTiO 3 lead-free ceramics
AU - Zhang, Shujun
AU - Shrout, Thomas R.
AU - Nagata, Hajime
AU - Hiruma, Yuji
AU - Takenaka, Tadashi
N1 - Funding Information:
Manuscript received October 9, 2006; accepted December 7, 2006. This work was supported by the Office of Naval Research (ONR) and National Institutes of Health (NIH) under grant no. P41-RR11795.
PY - 2007/5
Y1 - 2007/5
N2 - Lead-free piezoelectric ceramics with compositions around the morphotropic phase boundary (MPB) x(Na0.5Bi0.5)TiO3-y(K 0.5Bi0.5)TiO3-zBaTiO3 [x + y + z = 1; y : z = 2:1] were synthesized using conventional, solid-state processing. Dielectric maximum temperatures of 280° C and 262° C were found for tetragonal 0.79(Na0.5Bi0.5)TiO3-0.14(K 0.5Bi0.5)TiO3-0.07BaTiO3 (BNBKT9) and MPB composition 0.88(Na0.5Bi0.5)TiO 3-0.08(K0.5Bi0.5)TiO3-0.04BaTiO 3 (BNBK88), with depolarization temperatures of 224°C and 162°C, respectively. Piezoelectric coefficients d33 were found to be 135 pC/N and 170 pC/N for BNBK79 and BNBK88, and the piezoelectric d 31 was determined to be -37 pC/N and - 51 pC/N, demonstrating strong anisotropy. Coercive field values were found to be 37 kV/cm and 29 kV/cm for BNBK79 and BNBK88, respectively. The remanent polarization of BNBK88 (∼40 μC/cm2) was larger than that of BNBK79 (∼29 μC/cm 2). The piezoelectric, electromechanical, and high-Held strain behaviors also were studied as a function of temperature and discussed.
AB - Lead-free piezoelectric ceramics with compositions around the morphotropic phase boundary (MPB) x(Na0.5Bi0.5)TiO3-y(K 0.5Bi0.5)TiO3-zBaTiO3 [x + y + z = 1; y : z = 2:1] were synthesized using conventional, solid-state processing. Dielectric maximum temperatures of 280° C and 262° C were found for tetragonal 0.79(Na0.5Bi0.5)TiO3-0.14(K 0.5Bi0.5)TiO3-0.07BaTiO3 (BNBKT9) and MPB composition 0.88(Na0.5Bi0.5)TiO 3-0.08(K0.5Bi0.5)TiO3-0.04BaTiO 3 (BNBK88), with depolarization temperatures of 224°C and 162°C, respectively. Piezoelectric coefficients d33 were found to be 135 pC/N and 170 pC/N for BNBK79 and BNBK88, and the piezoelectric d 31 was determined to be -37 pC/N and - 51 pC/N, demonstrating strong anisotropy. Coercive field values were found to be 37 kV/cm and 29 kV/cm for BNBK79 and BNBK88, respectively. The remanent polarization of BNBK88 (∼40 μC/cm2) was larger than that of BNBK79 (∼29 μC/cm 2). The piezoelectric, electromechanical, and high-Held strain behaviors also were studied as a function of temperature and discussed.
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U2 - 10.1109/TUFFC.2007.336
DO - 10.1109/TUFFC.2007.336
M3 - Article
C2 - 17523555
AN - SCOPUS:34250357678
SN - 0885-3010
VL - 54
SP - 910
EP - 916
JO - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
JF - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
IS - 5
ER -