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首页> 外文期刊>Journal of Materials Research >Phase transitions of (1- x) PbZrO_3 + x (Na_1/2Bi_1/2)TiO_3 (0.01 ≤c x ≤ 0.15) solid solutions
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Phase transitions of (1- x) PbZrO_3 + x (Na_1/2Bi_1/2)TiO_3 (0.01 ≤c x ≤ 0.15) solid solutions

机译：（1-x）PbZrO_3 + x（Na_1 / 2Bi_1 / 2）TiO_3（0.01≤cx≤0.15）固溶体的相变

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摘要

Morphotropic phase boundaries and temperature dependent phase transitions of (l - x) PbZrO_3 + x (Na_l/2Bi_l/2)TiO_3 (0.0l ≤ x ≤ 0.l5) solid solutions were investigated by x-ray diffraction, differential scanning calorimetry (DSC), and dielectric property analysis. Two morphotropic phase transitions at room temperature were found at x = 0.1 and 0.13, which were from antiferroelectric orthorhombic (with 4 X 4 X 2 superlattice [orthorhombic (I)]) to antiferroelectric orthorhombic (with 2 X 2 X 2 superlattice [orthorhombic (II)]) and from orthorhombic (II) to ferroelectric rhombohedral, respectively. With increasing temperature, the samples with 0.0l ≤ x < 0.1 showed two phase transitions, i.e., from orthorhombic (I) to orthorhombic (II) and from ortho- rhombic (II) to cubic. The other samples had only one phase transition with increasing temperature. Phase transition temperatures of all the samples were measured using DSC, and a phase diagram for the solid solutions was constructed. A model illustrating the antiparalled shift of Pb ions in the orthorthombic (II) phase was also proposed.
机译：通过X射线衍射，差示扫描量热法（DSC）研究了（l-x）PbZrO_3 + x（Na_l / 2Bi_l / 2）TiO_3（0.0l≤x≤0.15）固溶体的形态相界和温度相关的相变），以及介电特性分析。在室温下，在x = 0.1和0.13处发现了两个同相相变，这两个相变是从反铁电斜方晶（具有4 X 4 X 2超晶格[斜方晶系（I）]）到反铁电斜方晶（具有2 X 2 X 2超晶格[斜方晶（ II）]）和分别从正交（II）到铁电菱形体。随着温度的升高，0.0l≤x <0.1的样品表现出两个相变，即从正交晶体（I）到正交晶体（II）和从正交菱形（II）到立方晶体。其他样品仅随温度升高而具有一个相变。使用DSC测量所有样品的相变温度，并构建固溶体的相图。还提出了一个模型，该模型说明了Pb离子在正交（II）相中的反平行位移。

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