Three-dimensional phase diagram of the Pb(Zr,Ti)O3 system under hydrostatic pressure
Three-dimensional phase diagram of the Pb(Zr,Ti)O3 system under hydrostatic pressure
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静水压力下Pb(Zr,Ti)O3体系的三维相图
DOI：
10.1016/s0272-8842(99)00096-6
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发表时间：
2000
影响因子：
5.2
通讯作者：
H. Jang
中科院分区：
文献类型：
--
作者：
S. Oh;H. Jang
评估了菱形 Pb(Zr,Ti)O3(PZT) 中 FR(LT)−FR(HT) 相变的旋转伸缩系数。使用唯象热力学形式主义，可以预测 PZT 在静水压力下热力学稳定相场的变化。随着拉伸静水压力的增加，顺铁电转变温度升高，FR(LT)–FR(HT)转变温度降低，同型相界(MPB)的组成向四方相场移动。与这些相反，随着压缩压力的增加，预计会出现相反的趋势。使用成分、压力和温度作为三个独立的热力学变量计算了 PZT 系统的三维相图。
The rotostrictive coefficient of FR(LT)−FR(HT)phase transition in the rhombohedral Pb(Zr,Ti)O3(PZT) has been evaluated. Using a phenomenological thermodynamic formalism a shift of the thermodynamically stable phase fields of PZT under hydrostatic pressure has been predicted. The para-ferroelectric transition temperature increases, the FR(LT)–FR(HT)transition temperature decreases, and the composition of the morphotropic phase boundary (MPB) moves towards the tetragonal phase field with increasing tensile hydrostatic pressure. Contrary to these, opposite trends were predicted with increasing compressive pressure. Three-dimensional phase diagrams of PZT system using composition, pressure and temperature as the three independent thermodynamic variables have been computed.