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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 .1. Structural studies
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Thermodynamic nature of phase transitions in Pb(ZrxTi1-x)O-3 ceramics near the morphotropic phase boundary .1. Structural 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1。结构研究

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The room-temperature structures of Pb(ZrxTi1-x)O-3 ceramics are shown to be tetragonal for x less than or equal to 0.52 and rhombohedral for x greater than or equal to 0.530 while both the rhombohedral phase (R-phase) and the tetragonal phase (T-phase) coexist at x = 0.525 corresponding to the morphotropic phase boundary (MPB). Ceramics with x = 0.530 and 0.535 undergo the following sequence of phase transitions with increasing temperature R --> R + T --> T --> cubic (C). For x = 0.525, the sequence is R + T --> T --> C while, for x = 0.520, the T-phase directly transforms into C. The T-to-C-phase transitions for all the compositions is shown to be discontinuous. The phase transition sequence for x greater than or equal to 0.525 confirms that the MPB consists of a two-phase region and that it is tilted towards the Zr-rich end.
机译：Pb（ZrxTi1-x）O-3陶瓷的室温结构在x小于或等于0.52时呈四边形，在x大于或等于0.530时呈菱面体，而菱形面相（R相）和四方相（T相）在x = 0.525处共存，对应于相变相边界（MPB）。 x = 0.530和0.535的陶瓷随着温度R-> R + T-> T->立方（C）的升高经历以下相变顺序。对于x = 0.525，序列为R + T-> T-> C，而对于x = 0.520，T相直接转变为C。显示了所有成分的T相到C相转变不连续。 x的相变序列大于或等于0.525确认MPB由两相区域组成，并且向富Zr端倾斜。

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