(1-x)(K0.5Na0.5NbO3)-xCaZrO3压电陶瓷的制备与性能  

Preparation and characteristics of(1-x)(KNaNbO)-xCaZrO piezoelectric ceramics

作　　者：杨绳岩 张杨 李宏林 YANG Shengyan;ZHANG Yang;LI Honglin(College of Chemical and Material Engineering,Chaohu University,Chaohu 238000,China)

机构地区：[1]巢湖学院化学与材料工程学院,安徽巢湖238000

出　　处：《传感器与微系统》2020年第9期24-26,30,共4页Transducer and Microsystem Technologies

基　　金：安徽省高校自然科学研究重点资助项目(KJ2018A0458);巢湖学院中心专项项目(XLY-201913)。

摘　　要：采用常规固相烧结法制备了(1-x)(K0.5Na0.5NbO3)-xCaZrO3[(1-x)KNN-xCZ]压电陶瓷;研究了CaZrO3的掺杂及量变(x=0.02,0.04,0.06,0.08)对陶瓷的微观结构、表面形貌、压电性能、铁电性能和介电性能的影响。实验结果表明:CaZrO3的掺杂并未改变陶瓷样品的晶体结构,所有样品均为单一的钙钛矿结构;适量引入CaZrO3能够促使陶瓷样品的晶粒更加均匀,提高致密性;能够增大压电常数、剩余极化强度,降低矫顽场,在一定程度上促进了KNN-CZ陶瓷样品电性能的优化。[(1-x)KNN-xCZ]压电陶瓷的单向电致应变(ε)、Curie温度介电常数峰(εr)、压电常数(d33)在x=0.04时达到最大值,分别为ε=0.055%,εr=5262,d33=188pC/N。The(1-x)(K0.5Na0.5NbO3)-xCaZrO3[(1-x)KNN-x CZ]piezoelectric ceramics are prepared by conventional solid-phase sintering.The effects of the doping of CaZrO3 and the quantitative change(x=0.02,0.04,0.06,0.08)on the microstructure,surface morphology,piezoelectric properties,ferroelectric properties and dielectric properties of the ceramics are studied.The results show that the doping of CaZrO3 does not change the crystal structure of the ceramic samples,and all the samples are single perovskite structure.The introduction of CaZrO3 can make the grains more uniform,improve the compactness.And also it can increase the piezoelectric constant,the residual polarization strength and reduce the coercive field,which extent promotes the optimization of the electrical properties of KNN-CZ ceramic samples.The unidirectional electric strain(ε),Curie temperature dielectric constant peak(εr)and piezoelectric constant(d33)of[(1-x)KNN-xCZ]piezoelectric ceramics reach the maximum value when x=0.04,respectively,ε=0.055%,εr=5262,d33=188 p C/N.

关 键 词：无铅压电陶瓷 二氧化锆 掺杂改性 压电性能 

分 类 号：O646.5[理学—物理化学] TP212[理学—化学]