TY - JOUR
T1 - Doping effects of strontium on the piezoelectric and dielectric properties of Ca additive Sm-modified PbTiO3 ceramics
AU - Chu, Sheng Yuan
AU - Chen, Te Yi
N1 - Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2004/10/4
Y1 - 2004/10/4
N2 - Effects of Sr dopants on the piezoelectric and dielectric properties of (Ca, Sm)-modified PbTiO3 ceramics have been investigated. The modified lead PbTiO3 ceramics with a composition of (Pb 0.73-xCa0.15SrxSm0.08)(Ti 0.98Mn0.02)O3; x=0.05-0.1 were prepared by conventional mixed-oxide methods with sintering temperature at 1200°C. Microstructural and compositional analyses of these doped ceramics have been carried out using XRD and SEM. We successfully showed that Sr additive is helpful to reduce the lattice constant and obtain higher thickness electromechanical coupling coefficient, kt (>0.55), and still keep small planar electromechanical coupling coefficient, kp. In addition, Sr additives varied the temperature coefficient of resonant frequency (TCF) value from a positive value (+34ppm/°C) to a negative value (-47.2ppm/°C), and there exists a point with the TCF value close to zero between Sr=0.06-0.065.
AB - Effects of Sr dopants on the piezoelectric and dielectric properties of (Ca, Sm)-modified PbTiO3 ceramics have been investigated. The modified lead PbTiO3 ceramics with a composition of (Pb 0.73-xCa0.15SrxSm0.08)(Ti 0.98Mn0.02)O3; x=0.05-0.1 were prepared by conventional mixed-oxide methods with sintering temperature at 1200°C. Microstructural and compositional analyses of these doped ceramics have been carried out using XRD and SEM. We successfully showed that Sr additive is helpful to reduce the lattice constant and obtain higher thickness electromechanical coupling coefficient, kt (>0.55), and still keep small planar electromechanical coupling coefficient, kp. In addition, Sr additives varied the temperature coefficient of resonant frequency (TCF) value from a positive value (+34ppm/°C) to a negative value (-47.2ppm/°C), and there exists a point with the TCF value close to zero between Sr=0.06-0.065.
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U2 - 10.1016/j.sna.2003.10.033
DO - 10.1016/j.sna.2003.10.033
M3 - Article
AN - SCOPUS:4444333443
SN - 0924-4247
VL - 116
SP - 10
EP - 14
JO - Sensors and Actuators, A: Physical
JF - Sensors and Actuators, A: Physical
IS - 1
ER -