Large piezoelectric anisotropy and high hydrostatic piezoelectric activity due to an appreciable orientation effect and porosity in novel 2-2-0 composites

作     者：Vitaly Yu.Topolov Andrey V.Krivoruchko Natalia V.Prutsakova 

作者机构：Department of PhysicsSouthern Federal University5 Zorge Street Rostov-on-Don 344090Russia Don State Technical University1 Gagarin Square Rostov-on-Don 344000Russia 

出 版 物：《Journal of Advanced Dielectrics》 (先进电介质学报（英文）)

年 卷 期：2023年第13卷第2期

页      面：38-48页

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the Southern Federal University(research topic“Development and Materials-Science Substantiation of the Creation of Materials and Products Based on Piezoelectric Ceramics Using Additive Technologies” stage 2022 contract No.176/22-D July 11th 2022) 

主　　题：Piezo-active composite 2-2-type orientation effect porosity large piezoelectric anisotropy 

摘      要：The polarization orientation effect and porosity effect on the piezoelectric properties and related parameters are studied in 2-2-type composites based on domain-engineered relaxor-ferroelectric[011]-poled single *** parameters,which are of great interest,are an anisotropy of the piezoelectric coefficients d_(3j)^(*),an anisotropy of the energy-harvesting figures of merit d_(3j)^(*)g_(3j)^(*) and the hydrostatic piezoelectric coefficient d_(h)^(*).An orientation of the main crystallographic axes in each polydomain single-crystal layer is described by anglesβandγ.Diagrams built for the first time show the(β,γ)regions,where a large anisot­ropy of d_(3j)^(*)(or d_(3j)^(*)g_(3j)^(*))is achieved,and where inequality d_(h)^(*)1000 pC/N holds.A large local max d_(h)^(*)=1930 pC/N is achieved in a 2-2-0 PZN-0.065PT-based composite at the longitudinal piezoelectric coefficient d33*=2290 pC/N and figure of merit d*33g*33=1.02.10−9 Pa−*** aforementioned large parameters are to be of value in piezoelectric sensing,energy harvesting and hydroacoustics.