TY - JOUR
T1 - Electrical properties of Pb(Mg1/3Nb2/3)O 3-PbTiO3 ceramics modified with WO3
AU - Zhong, Ni
AU - Dong, Xian Lin
AU - Sun, Da Zhi
AU - Xiang, Ping Hua
AU - Du, Hui
PY - 2004/2/2
Y1 - 2004/2/2
N2 - Ferroelectrics 0.67Pb (Mg1/3Nb2/3)O 3-0.33PbTiO3 (PMN-PT) + xmol% WO3 (x=0.1, 0.5, 1, 2) were prepared by columbite precursor method. Electrical properties of WO3-modified ferroelectrics were investigated. X-ray diffraction (XRD) was used to identify crystal structure, and pyrochlore phase were observed in 0.67Pb (Mg1/3Nb2/3)O 3-0.33PbTiO3+2mol% WO3. Dielectric peak temperature decreased with WO3 doping, indicating that W 6+ incorporated into PMN-PT lattice. Lattice constant, pyrochlore phase and grain size contribute to the variation of Kmax. Both piezoelectric constant (d33) and electromechanical coupling factors (kp) were enhanced by doping 0.1mol% WO3, which results from the introduction of "soft" characteristics into PMN-PT, while further WO3 addition was detrimental. We consider that the two factors, introduction of "soft" characteristics and the formation of pyrochlore phase, appear to act together to cause the variation of piezoelectric properties of 0.67PMN-0.33PT ceramics doping with WO3.
AB - Ferroelectrics 0.67Pb (Mg1/3Nb2/3)O 3-0.33PbTiO3 (PMN-PT) + xmol% WO3 (x=0.1, 0.5, 1, 2) were prepared by columbite precursor method. Electrical properties of WO3-modified ferroelectrics were investigated. X-ray diffraction (XRD) was used to identify crystal structure, and pyrochlore phase were observed in 0.67Pb (Mg1/3Nb2/3)O 3-0.33PbTiO3+2mol% WO3. Dielectric peak temperature decreased with WO3 doping, indicating that W 6+ incorporated into PMN-PT lattice. Lattice constant, pyrochlore phase and grain size contribute to the variation of Kmax. Both piezoelectric constant (d33) and electromechanical coupling factors (kp) were enhanced by doping 0.1mol% WO3, which results from the introduction of "soft" characteristics into PMN-PT, while further WO3 addition was detrimental. We consider that the two factors, introduction of "soft" characteristics and the formation of pyrochlore phase, appear to act together to cause the variation of piezoelectric properties of 0.67PMN-0.33PT ceramics doping with WO3.
KW - A. Ceramics
KW - B. Chemical synthesis
KW - C. X-ray diffraction
KW - D. Electrical properties
UR - https://www.scopus.com/pages/publications/0347758630
U2 - 10.1016/j.materresbull.2003.10.007
DO - 10.1016/j.materresbull.2003.10.007
M3 - 文章
AN - SCOPUS:0347758630
SN - 0025-5408
VL - 39
SP - 175
EP - 184
JO - Materials Research Bulletin
JF - Materials Research Bulletin
IS - 2
ER -