The temperature dependence of the shear piezoelectric responses in relaxor-PbTiO3 based perovskite crystals with rhombohedral, orthorhombic, and tetragonal phases were investigated. Based on thermodynamic analysis, high shear piezoelectric coefficients (d24) and good thermal stability were predicted in orthorhombic crystals, owing to the “vertical” orthorhombic-rhombohedral phase boundary. By resonance measurements, shear piezoelectric coefficient d24 was found to be on the order of ∼2100 pC∕N at room temperature, maintaining same value over the temperature range of −50–100 °C. In contrast, the shear piezoelectric coefficients d15, with values of 3300, 3600, and 2000 pC∕N at room temperature for rhombohedral, orthorhombic, and tetragonal crystals, respectively, exhibited strong temperature dependent behavior due to their respective ferroelectric-ferroelectric phase transitions.
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机译：研究了具有菱面体，正交晶和四方晶相的弛豫-PbTiO3基钙钛矿晶体中剪切压电响应的温度依赖性。根据热力学分析，由于“垂直”斜方晶-菱面体相边界，在斜方晶中预测了高剪切压电系数（d24）和良好的热稳定性。通过共振测量，发现室温下的剪切压电系数d24约为〜2100 pC ∕ N，在−50–100°C的温度范围内保持相同的值。相反，对于菱面体，正交晶体和四方晶体，在室温下的剪切压电系数d15分别为3300、3600和2000 pC ∕ N，由于它们各自的铁电-铁电相变，它们表现出很强的温度依赖性。
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