Ba0.65Sr0.35TiO3 ceramics doped with B2O3-SiO2 glass composition were prepared by using conventional solid-state reaction method. The effects of glass dopant on the dielectric and ferroelectric properties were investi...Ba0.65Sr0.35TiO3 ceramics doped with B2O3-SiO2 glass composition were prepared by using conventional solid-state reaction method. The effects of glass dopant on the dielectric and ferroelectric properties were investigated. The results show that the dielectric constant decreases while the dielectric loss increases after doping. And as the glass content increases the dielectric constant decreases while the dielectric loss changes slightly. From the complex impedance analysis the resistance and the relaxation time of the grain and the grain boundary can be calculated. Comparing the P—E hysteresis loop of undoped Ba0.65Sr0.35TiO3 ceramics with that of B2O3-SiO2 doped Ba0.65Sr0.35TiO3 ceramics, it can be seen that the remanent polarization decreases when the B2O3-SiO2 content is lower than 8%（molar fraction）, and the coercive field increases with the increase of B2O3-SiO2 content.展开更多
Ferroelectric phase diagrams and the temperature dependence of polarization,dielectric properties of the three pseudo-spin in ferroelectric or ferro-antiferroelectric systemdescribed by a transverse Ising models are i...Ferroelectric phase diagrams and the temperature dependence of polarization,dielectric properties of the three pseudo-spin in ferroelectric or ferro-antiferroelectric systemdescribed by a transverse Ising models are investigated on the basis of the effective-Geld theorywith the differential operator technique. The effects of the transverse field and the couplingstrength between the nearest-neighboring pseudo-spin on the physical properties are discussed indetail.展开更多
基金Project(50372017/E0204) supported by the National Natural Science Foundation of China
文摘Ba0.65Sr0.35TiO3 ceramics doped with B2O3-SiO2 glass composition were prepared by using conventional solid-state reaction method. The effects of glass dopant on the dielectric and ferroelectric properties were investigated. The results show that the dielectric constant decreases while the dielectric loss increases after doping. And as the glass content increases the dielectric constant decreases while the dielectric loss changes slightly. From the complex impedance analysis the resistance and the relaxation time of the grain and the grain boundary can be calculated. Comparing the P—E hysteresis loop of undoped Ba0.65Sr0.35TiO3 ceramics with that of B2O3-SiO2 doped Ba0.65Sr0.35TiO3 ceramics, it can be seen that the remanent polarization decreases when the B2O3-SiO2 content is lower than 8%（molar fraction）, and the coercive field increases with the increase of B2O3-SiO2 content.
基金辽宁省自然科学基金，the Hong Kong Polytechnic University through the University Research Grant
文摘Ferroelectric phase diagrams and the temperature dependence of polarization,dielectric properties of the three pseudo-spin in ferroelectric or ferro-antiferroelectric systemdescribed by a transverse Ising models are investigated on the basis of the effective-Geld theorywith the differential operator technique. The effects of the transverse field and the couplingstrength between the nearest-neighboring pseudo-spin on the physical properties are discussed indetail.
