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Enhanced piezoelectric properties and temperature stability in KNN-based textured ceramics

查看全文 作　　者：Yan [1]Lin;Ru [1]Wang;Jiawei [1]Qu;Shuo [1]Gao;Yi [1]Zhang;Junli [1]Yan;Jigong [1]Hao;Peng [1]Li;Wei [1]Li 高影响力作者 机构地区：[1]School of Materials Science and Engineering,Liaocheng University Liaocheng 252059,P.R.China高影响力机构 出　　处：《Journal of Advanced Dielectrics》索引2022年第12卷第5期,共7页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(Grant No.52102132);the Natural Science Foundation of Shandong Province of China(Grant Nos.ZR2020QE043,ZR2020ME031and ZR2020ME033);the Innovation Team of Higher Educational Science and Technology Program of Shandong Province(Grant No.2019KJA025);Research Foundation for the Doctoral Program of Liaocheng University(Grant No.318051932). 摘　　要：Considering the advantages of high Curie temperature and environment-friendly nature of KNN piezoelectric ceramics,the limitation of weak piezoelectric response and their temperature sensitivity to applications is worth exploring.Herein,the<001>textured(1-x)(K_(0.5)Na_(0.5))(Nb0.96Sb0.04)O3-x(Bi_(0.5)Na_(0.5))HfO_(3)(x=0.01-0.045)lead-free ceramics were synthesized by templated grain-growth method.The high piezoelectric performance(d33 of 474 pC/N and strain of 0.21%)and excellent temperature stability(unipolar strain maintained within 4.3%change between 30℃and 165℃)were simultaneously achieved in the textured KNNS-0.03BNH ceramics.The high piezoelectric performance can be attributed to the summation of the crystallographic anisotropy and phase structure contributions in<001>textured ceramics.The superior temperature stability of piezoelectric properties can be interpreted by the contribution of crystal anisotropy to piezoelectric properties reduces the effect of phase transition on piezoelectric properties deterioration.This study provides an effective strategy for simultaneously achieving high piezoelectric properties and superior temperature stability in KNN-based textured ceramics. 关 键 词：Textured ceramics phase structure piezoelectric properties temperature stability
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