The composite materials of lead titanate ceramics were obtained \%via\% sol\|gel methods and hydrothermal process. In order to study the effects of sintering temperature and the sintering techniques for the microconfi...The composite materials of lead titanate ceramics were obtained \%via\% sol\|gel methods and hydrothermal process. In order to study the effects of sintering temperature and the sintering techniques for the microconfiguration as well as the intensity of ceramics, the dielectric constants, dielectric loss and resistance of ceramics mixture were discussed. In addition, the composite mechanism was discussed in elementary.展开更多
With first-principles virtual-crystal approximation calculations, we systematically investigate the geometric and elec- tronic structures as well as the phase transition of lead zirconate titanate （PbZr 1-xTixO3 or ...With first-principles virtual-crystal approximation calculations, we systematically investigate the geometric and elec- tronic structures as well as the phase transition of lead zirconate titanate （PbZr 1-xTixO3 or PZT） as a function of Ti content for the whole range of 0 〈 XTi 〈 1. It can be found that, with the increase of the Ti content, the PbZr1-xTixO3 solid solutions undergo a rhombohedral-to-tetragonal phase transition, which is consistent with the experimental results. In addition, we also show the evolution in geometric and electronic structures of rhombohedral and tetragonal PbZr1-xTixO3 with the increasing content of Ti.展开更多
文摘The composite materials of lead titanate ceramics were obtained \%via\% sol\|gel methods and hydrothermal process. In order to study the effects of sintering temperature and the sintering techniques for the microconfiguration as well as the intensity of ceramics, the dielectric constants, dielectric loss and resistance of ceramics mixture were discussed. In addition, the composite mechanism was discussed in elementary.
基金Project supported by the National Natural Science Foundation of China (Grant Nos. 11104203, 11075116, 50972014, 51072024, and 51132002)the Foundation of Introduction of Talent of Tianjin Normal University, China (Grant No. 5RL100)
文摘With first-principles virtual-crystal approximation calculations, we systematically investigate the geometric and elec- tronic structures as well as the phase transition of lead zirconate titanate （PbZr 1-xTixO3 or PZT） as a function of Ti content for the whole range of 0 〈 XTi 〈 1. It can be found that, with the increase of the Ti content, the PbZr1-xTixO3 solid solutions undergo a rhombohedral-to-tetragonal phase transition, which is consistent with the experimental results. In addition, we also show the evolution in geometric and electronic structures of rhombohedral and tetragonal PbZr1-xTixO3 with the increasing content of Ti.
