文献类型：期刊文献

中文题名：BaTiO_(3)基无铅陶瓷大电致伸缩系数

英文题名：Large electrostrictive coefficients of BaTiO_(3)-based lead-free ceramics

作者：陈小明 李国荣

第一作者：陈小明

通信作者：Chen, XM[1];Chen, XM[2]

机构：[1]贵州理工学院材料与能源工程学院,贵阳550003;[2]中国科学院上海硅酸盐研究所,无机功能材料与器件重点实验室,上海200050

第一机构：贵州理工学院材料与能源工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China;corresponding author), Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Inorgan Funct Mat & Devices, Shanghai 200050, Peoples R China.|贵州理工学院;

年份：2022

卷号：71

期号：16

起止页码：360-368

中文期刊名：物理学报

外文期刊名：Acta Physica Sinica

收录：CSTPCD;;EI(收录号：20223812744564);Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：Project supported by the National Natural Science Foundation of China (Grant No. 52162015), the Natural Science Foundation of Guizhou Province, China (Grant No. [2020]1Y204), the Opening Project of Key Laboratory of Inorganic Functional Materials and Devices, Chinese Academy of Sciences (Grant No. KLIFMD202201), and the Fund of Guizhou Institute of Technology, China (Grant Nos. XJGC20190920, GZLGXM-21).

语种：中文

中文关键词：无铅陶瓷;(Ba;Ca)(Ti;Zr)O_(3);表面效应;电致伸缩系数

外文关键词：lead-free piezoceramics;(Ba;Ca)(Ti;Zr)O_(3);surface effect;electrostrictive coefficients

摘要：微位移驱动器在航天、半导体和工业等领域有着重要应用,现在市场上大部分采用的是铅基压电陶瓷材料.出于环境保护和法规限制的考虑,亟需研发具有优良电致伸缩性能的无铅陶瓷材料.作为一类ABO_(3)型铁电体,(Ba,Ca)(Ti,Zr)O_(3)(BCTZ)无铅陶瓷由于具备高压电系数而引发大量关注.本文借助固相法,制备了高电致伸缩系数的(Ba_(0.85)Ca_(0.15))(Ti_(0.9)Zr_(0.1))O_(3)陶瓷(BCTZ).研究了烧结温度对BCTZ陶瓷结构和电学性能的影响.研究结果表明:在室温附近,BCTZ陶瓷晶相结构形成正交(O)-四方(T)两相共存.烧结温度促进了BCTZ陶瓷致密性改善和晶粒长大.当烧结温度为1300℃时,BCTZ陶瓷晶粒尺寸在1μm左右,可获得大电致伸缩系数Q33(5.84×10^(–2)m~4/C~2),大约是传统PZT陶瓷的2倍.这可能是陶瓷晶粒尺寸所产生的表面效应和A—O化学键所具有的强离子性共同作用的结果.此外,室温附近BCTZ陶瓷虽处于正交-四方两相相界,但陶瓷电致伸缩系数Q33在测量温度为25—100℃范围间具有良好的温度稳定性.
Micro-displacement actuators have important applications in aerospace,semiconductor,industry and other fields.Now most of the lead-based piezoelectric ceramics are used in the market.In consideration of environmental protection and legal restriction,it is urgent to develop lead-free ceramic materials with excellent elect rostrictive properties.As a kind of ABO_(3)-type ferroelectrics,(Ba,Ca)(Ti,Zr)0_(3) lead-free ceramics have attracted a lot of attention because of their high piezoelectricity.In this work,(Ba_(0.85)Ca_(0.15))(Ti_(0.9)Zr_(0.1))O_(3)(BCTZ) ceramics with high elect rostrictive coefficient are prepared by the solid-state method.The effects of sintering temperature on the structures and electrical properties of BCTZ ceramics are studied.The results show that the sintering temperature can help to improve density and grain growth of BCTZ ceramic.There are no impurity phases in the BCTZ ceramic systems,and all samples show ABO_(3)-type perovskite structures.At room temperature,the crystal structure of BCTZ ceramic forms coexistence of orthogonal(O)-tetragonal(T)phase.The dielectric peak of BCTZ ceramic is widened,and the Curie temperature reaches a maximum value of110℃ when T_(s)=1300℃ With the increase of sintering temperature,the dielectric peak of BCTZ ceramic gradually becomes narrowed,and the Curie temperature of ceramic moves toward low temperature.As the sintering temperature is 1300 ℃,the grain size of BCTZ ceramic is 1 μm,the large electrostrictive coefficient Q_(33)(5.84 × 10^(-2) m~4/C~2) can be obtained,which is about twice that of traditional PZT ceramic.This may be attributed to combination of the surface effect caused by grain size of BCTZ ceramic with the strong ionic nature of A-O chemical bond.In addition,although BCTZ ceramic has an O-T phase boundary near room temperature,the elect rostrictive coefficient Q33 of ceramic has good temperature stability in a range of 25-100℃.It shows that the crystal phase and temperature have no effect on the elect rostrictive coefficient of BCTZ leadfree ceramic.It provides a new idea for designing the high elect rostrictive properties of lead-free piezoelectric ceramics with potential applications.