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首页> 外文期刊>RSC Advances >High piezoelectric response and polymorphic phase region in the lead-free piezoelectric BaTiO3–CaTiO3–BaSnO3 ternary system
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High piezoelectric response and polymorphic phase region in the lead-free piezoelectric BaTiO3–CaTiO3–BaSnO3 ternary system

机译：无铅压电BaTiO 3 –CaTiO 3 –BaSnO 3 三元体系中的高压电响应和多态相区

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摘要

This study attempted to replace Pb-based piezoelectric ceramics with a non-toxic lead-free (Ba,Ca)(Ti,Sn)O3 substitute, according to current environmental standards. The design of the (Ba(0.825+x)Ca(0.175?x))(Ti(1?x)Snx)O3 lead-free piezoceramics reported herein was based on chemical modifications by varying Sn concentrations (x = 0.0500–0.1250). The effect of Sn ion modifications on structural evolution and dielectric, ferroelectric and piezoelectric properties was investigated. Partial substitution of Ti with Sn yields a suitable composition with multiphase boundaries near room temperature. As a result, the composition, x = 0.1000, shows outstanding piezoelectric values of d33 = 515 pC N?1 and = 1293 pm V?1 at 10 kV, which are higher than those found in commercially available soft PZT. Furthermore, anomalous dielectric relaxation is far below the rhombohedral to orthorhombic phase transition at T ≈ 90–150 K, and was found clearly in all compositions. The relaxation fitted the Vogel–Fulcher model with an activation energy of Ea ≈ 20–70 meV and freezing temperature of TVF ≈ 65–85 K.
机译：这项研究试图根据当前环境，用无毒的无铅（Ba，Ca）（Ti，Sn）O 3 替代铅基压电陶瓷。标准。 （Ba （0.825+ x ） Ca （0.175？ x ） ）（Ti （1？ x ） Sn x < / em> ）O 3 无铅压电陶瓷是基于通过改变Sn浓度（ x = 0.0500–0.1250）。研究了锡离子改性对结构演变以及介电，铁电和压电性能的影响。用Sn部分取代Ti可以得到一种合适的成分，其室温附近具有多相边界。结果，组成 x = 0.1000，表现出出色的压电值 d 33 = 515 pC N ？1 且在10 kV时= 1293 pm V ？1 ，高于市售电压软PZT。此外，在 T ≈90–150 K时，异常介电弛豫远低于菱形到正交晶体的相变，并且在所有成分中都清楚地发现。弛豫使Vogel–Fulcher模型的活化能为 E a ≈20–70 meV，冻结温度为 T < / em> VF ≈65–85K。

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