ABSTRACT A piezoelectric performance of a novel 1–0–3 composite based on lead-free single crystals with 4mm symmetry is first analysed. Ferroelectric domain-engineered alkali niobate-tantalate based single crystals provide large values of the piezoelectric coefficients g*3j and g*h, squared figures of merit d*33 g*33 and d*h g*h, and a 0–3 matrix promotes a large piezoelectric anisotropy in specific volume-fraction ranges. An aspect-ratio effect concerned with spheroidal inclusions of a piezoelectric Li2B4O7 single crystal in a polymer medium is studied to show the considerable influence of these inclusions on the effective parameters of the composite. Values of g*33∼ 103 mV·m / N, g*h∼ (102–103) mV·m / N, d*33 g*33∼ 10−10 Pa−1, and d*h g*h∼ (10−11–10−10) Pa−1, and the large anisotropy of the piezoelectric coefficients d*3j and electromechanical coupling factors k*3j are achieved in the 1–0–3 composite based on a [001]-poled [Lix(K1-yNay)1-x](Nb1-zTaz)O3:Mn single crystal and make this composite suitable for piezoelectric sensor, energy-harvesting and hydroacoustic applications.

中文翻译：

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一种新型无铅 1-0-3 复合材料的高压电灵敏度和相关参数

摘要首先分析了基于具有 4mm 对称性的无铅单晶的新型 1-0-3 复合材料的压电性能。铁电畴设计的碱金属铌酸盐-钽酸盐基单晶提供较大的压电系数 g*3j 和 g*h，品质因数的平方 d*33 g*33 和 d*hg*h，0-3 矩阵促进在特定的体积分数范围内具有大的压电各向异性。研究了与聚合物介质中压电 Li2B4O7 单晶的球状夹杂物有关的纵横比效应，以显示这些夹杂物对复合材料有效参数的显着影响。g*33∼ 103 mV·m / N, g*h∼ (102–103) mV·m / N, d*33 g*33∼ 10−10 Pa−1, d*hg*h∼ ( 10-11-10-10) Pa-1,