TY - GEN
T1 - A new solid solution of (1-x)Ba(Mg1/3Nb2/3)O 3 - xPbTiO3 with dielectric, relaxor and ferroelectric properties
AU - Long, Xifa
AU - Ye, Zuo Guang
PY - 2007
Y1 - 2007
N2 - A new solid solution of (1-x)Ba(Mg1/3Nb2/3)O 3-xPbTiO3 [(1-x)BMN-xPT] has been synthesized in the form of ceramics by solid state reactions and characterized by means of X-ray diffraction, dielectric spectroscopy and ferroelectric measurements. A partial solid state phase diagram of the binary system is established. It exhibits a morphotropic phase boundary region in the composition range between x = 0.71 and 0.74. The dielectric permittivity of BMN has been greatly enhanced by the substitution of PT. The ceramics of 0.4BMN-0.6PT show typical relaxor ferroelectric behavior with a strong dispersion of the maximum of dielectric permittivity (ε') appearing around the temperature of Tm, which shifts towards higher temperatures with increasing frequency. The variation of Tm with frequency follows the Vogel-Fulcher relationship. A deviation from the Curie-Weiss law is observed above Tm. Instead, the variation of 1/ε' with temperature above Tm satisfies a Lorentz-type function. With further increase of the PT-content, the permittivity peaks become sharper and frequency-independent, indicating a ferroelectric phase transition, the temperature of which (TC) increases with x. Thus, the transformation from a simple dielectric, to relaxor and to ferroelectric phase has been demonstrated in this solid solution system.
AB - A new solid solution of (1-x)Ba(Mg1/3Nb2/3)O 3-xPbTiO3 [(1-x)BMN-xPT] has been synthesized in the form of ceramics by solid state reactions and characterized by means of X-ray diffraction, dielectric spectroscopy and ferroelectric measurements. A partial solid state phase diagram of the binary system is established. It exhibits a morphotropic phase boundary region in the composition range between x = 0.71 and 0.74. The dielectric permittivity of BMN has been greatly enhanced by the substitution of PT. The ceramics of 0.4BMN-0.6PT show typical relaxor ferroelectric behavior with a strong dispersion of the maximum of dielectric permittivity (ε') appearing around the temperature of Tm, which shifts towards higher temperatures with increasing frequency. The variation of Tm with frequency follows the Vogel-Fulcher relationship. A deviation from the Curie-Weiss law is observed above Tm. Instead, the variation of 1/ε' with temperature above Tm satisfies a Lorentz-type function. With further increase of the PT-content, the permittivity peaks become sharper and frequency-independent, indicating a ferroelectric phase transition, the temperature of which (TC) increases with x. Thus, the transformation from a simple dielectric, to relaxor and to ferroelectric phase has been demonstrated in this solid solution system.
UR - https://www.scopus.com/pages/publications/51349137594
U2 - 10.1109/ISAF.2007.4393309
DO - 10.1109/ISAF.2007.4393309
M3 - 会议稿件
AN - SCOPUS:51349137594
SN - 1424413338
SN - 9781424413331
T3 - IEEE International Symposium on Applications of Ferroelectrics
SP - 493
EP - 496
BT - 2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF
T2 - 2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF
Y2 - 27 May 2007 through 31 May 2007
ER -