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首页> 外文期刊>Philosophical magazine, B. Physics of condensed matter, electronic, optical, and magnetic properties >Thermodynamic nature of phase transitions in Pb(ZrxTi1-x)O-3 ceramics near the morphotropic phase boundary .2. Dielectric and piezoelectric studies
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Thermodynamic nature of phase transitions in Pb(ZrxTi1-x)O-3 ceramics near the morphotropic phase boundary .2. Dielectric and piezoelectric studies

机译：形态相界附近的Pb（ZrxTi1-x）O-3陶瓷相变的热力学性质.2。介电和压电研究

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From a study of the temperature dependence of the dielectric constant of Pb(ZrxTi1-x)O-3 the ferroelectric transition for 0.515 less than or equal to 0.535 is shown to be discontinuous in nature while it is continuous for x = 0.550. It is proposed that there may be a tricritical point around x = 0.545. The two-phase nature of the morphotropic phase boundary (MPB) has been confirmed from the temperature dependence of the resonance frequency. The temperature variation in the planar coupling coefficient k(p) is correlated with structural changes to show that the maximum k(p) at a given Zr concentration x is a function of temperature T and occurs in the tetragonal phase field just outside the two-phase MBP region in the (x,T) plane.
机译：根据对Pb（ZrxTi1-x）O-3介电常数的温度依赖性的研究，0.515小于或等于0.535的铁电跃迁实际上是不连续的，而对于x = 0.550则是连续的。建议在x = 0.545附近存在一个三临界点。从共振频率的温度依赖性已经证实了同相相界（MPB）的两相性质。平面耦合系数k（p）的温度变化与结构变化相关，显示给定Zr浓度x时的最大k（p）是温度T的函数，并且出现在正方波场中，恰好位于两个（x，T）平面中的相位MBP区域。

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