TY - JOUR
T1 - Investigation of ternary system PbHfO 3-PbTiO 3-Pb (Mg 1/3 Nb 2/3) O 3 with morphotropic phase boundary compositions
AU - Wang, Dawei
AU - Cao, Maosheng
AU - Zhang, Shujun
PY - 2012/10
Y1 - 2012/10
N2 - Ternary system, (1-x)Pb(Hf 1-yTi y)O 3-xPb(Mg 1/3Nb 2/3)O 3 (x = 0-0.5, y = 0.45-0.70) was prepared using two-step precursor method. The phase structure, dielectric, piezoelectric, and ferroelectric properties of the ceramics near morphotropic phase boundary (MPB) have been investigated systematically. On the basis of the results of X-ray powder diffraction and dielectric-temperature measurement, the MPB region and isothermal map of Curie temperature (T C) for the ternary system were obtained. The optimum piezoelectric and electromechanical properties were achieved in the MPB composition 0.8Pb(Hf 0.445Ti 0.555)O 3-0.2Pb(Mg 1/3Nb 2/3)O 3, with piezoelectric d 33 being on the order of 680 pC/N, while the maximum high-field piezoelectric d 33 * of 780 pm/V was observed for 0.82Pb(Hf 0.445Ti 0.555)O 3-0.18Pb(Mg 1/3Nb 2/3)O 3 with tetragonal composition, due to the high extrinsic contribution induced by domain wall motion. In addition, the fracture toughness K IC and flexural strength σ f were measured and found to be 1.2 MPa·m 1/2 and 71.4 MPa, respectively, comparable to PZT-based ceramics.
AB - Ternary system, (1-x)Pb(Hf 1-yTi y)O 3-xPb(Mg 1/3Nb 2/3)O 3 (x = 0-0.5, y = 0.45-0.70) was prepared using two-step precursor method. The phase structure, dielectric, piezoelectric, and ferroelectric properties of the ceramics near morphotropic phase boundary (MPB) have been investigated systematically. On the basis of the results of X-ray powder diffraction and dielectric-temperature measurement, the MPB region and isothermal map of Curie temperature (T C) for the ternary system were obtained. The optimum piezoelectric and electromechanical properties were achieved in the MPB composition 0.8Pb(Hf 0.445Ti 0.555)O 3-0.2Pb(Mg 1/3Nb 2/3)O 3, with piezoelectric d 33 being on the order of 680 pC/N, while the maximum high-field piezoelectric d 33 * of 780 pm/V was observed for 0.82Pb(Hf 0.445Ti 0.555)O 3-0.18Pb(Mg 1/3Nb 2/3)O 3 with tetragonal composition, due to the high extrinsic contribution induced by domain wall motion. In addition, the fracture toughness K IC and flexural strength σ f were measured and found to be 1.2 MPa·m 1/2 and 71.4 MPa, respectively, comparable to PZT-based ceramics.
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U2 - 10.1111/j.1551-2916.2012.05300.x
DO - 10.1111/j.1551-2916.2012.05300.x
M3 - Article
AN - SCOPUS:84867097618
SN - 0002-7820
VL - 95
SP - 3220
EP - 3228
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 10
ER -