Abstract The article reports results of the comparative study on the performance of lead-free 1–3-type composites based on domain-engineered lead-free ferroelectric single crystals. Of interest are the 1–3–0 ferroelectric single crystal/porous polymer and 1–0–3 ferroelectric single crystal/piezoelectric single crystal/polymer composites with heterogeneous matrices. In the 1–3–0 composite this matrix is a polymer medium with the system of spheroidal air pores. In the 1–0–3 composite the polymer matrix contains a system of spheroidal piezoelectric single crystal inclusions, and the arrangement of these inclusions is similar to that of the pores in the matrix of the related 1–3–0 composite. Volume-fraction and aspect-ratio dependences of the piezoelectric properties, squared figure of merit and electromechanical coupling factors of the 1–3-type composites are analysed, and comparison of the effective parameters of the composites is made. The role of the composite microgeometry in forming the piezoelectric anisotropy and squared figures of merit is discussed. Due to large electromechanical coupling factors, squared figures of merit and anisotropy factors, the studied lead-free 1–3-type composites are of interest as advanced materials suitable for piezoelectric transducer, sensor and energy-harvesting applications.

中文翻译：

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基于铁电单晶的无铅1-3型复合材料的有效参数比较

摘要 本文报告了基于域工程无铅铁电单晶的无铅 1-3 型复合材料性能的比较研究结果。令人感兴趣的是具有异质基质的 1-3-0 铁电单晶/多孔聚合物和 1-0-3 铁电单晶/压电单晶/聚合物复合材料。在 1-3-0 复合材料中，该基质是具有球形气孔系统的聚合物介质。在 1-0-3 复合材料中，聚合物基体包含一个球状压电单晶夹杂物系统，这些夹杂物的排列与相关 1-3-0 复合材料的基体中孔的排列相似。压电特性的体积分数和纵横比依赖性，分析了1-3型复合材料的品质因数平方和机电耦合系数，并对复合材料的有效参数进行了比较。讨论了复合微观几何形状在形成压电各向异性和平方品质因数中的作用。由于机电耦合系数大、品质因数平方和各向异性系数，所研究的无铅 1-3 型复合材料作为适用于压电换能器、传感器和能量收集应用的先进材料而备受关注。