无机材料学报2025，Vol.40Issue(5)：545-551,中插9-中插10,9.DOI:10.15541/jim20240244
缺陷偶极子热稳定性对Fe掺杂PZT陶瓷机电性能影响研究
Defect Dipole Thermal-stability to the Electro-mechanical Properties of Fe Doped PZT Ceramics
摘要
Abstract
The accepted doping ion in Ti4+-site of PbZryTi1-yO3(PZT)-based piezoelectric ceramics is a well-known method to increase mechanical quality factor(Qm),since the acceptor coupled by oxygen vacancy becomes defect dipole,which prevents the domain rotation.In this field,a serious problem is that generally,Qm decreases as the temperature(T)increases,since the oxygen vacancies are decoupled from the defect dipoles.In this work,Qm of Pb0.95Sr0.05(Zr0.53Ti0.47)O3(PSZT)ceramics doped by 0.40%Fe2O3(in mole)abnormally increases as T increases,of which the Qm and piezoelectric coefficient(d33)at room temperature and Curie temperature(TC)are 507,292 pC/N,and 345℃,respectively.The maximum Qm of 824 was achieved in the range of 120-160℃,which is 62.52%higher than that at room temperature,while the dynamic piezoelectric constant(d31)was just slightly decreased by 3.85%.X-ray diffraction(XRD)and piezoresponse force microscopy results show that the interplanar spacing and the fine domains form as temperature increases,and the thermally stimulated depolarization current shows that the defect dipoles are stable even the temperature up to 240℃.It can be deduced that the aggregation of oxygen vacancies near the fine domains and defect dipole can be stable up to 240℃,which pins domain rotation,resulting in the enhanced Qm with the increasing temperature.These results give a potential path to design high Qm at high temperature.关键词
缺陷偶极子/温度特性/氧空位/机电性能/机械品质因数/硬化掺杂Key words
defect dipole/temperature characteristic/oxygen vacancy/electro-mechanical property/mechanical quality factor/hardening doping分类
化学化工引用本文复制引用
孙雨萱,王政,时雪,史颖,杜文通,满振勇,郑嘹赢,李国荣..缺陷偶极子热稳定性对Fe掺杂PZT陶瓷机电性能影响研究[J].无机材料学报,2025,40(5):545-551,中插9-中插10,9.基金项目
National Natural Science Foundation of China(U2241242) （U2241242）
National Key R&D Program of China(2023YFB3812000,2021YFA0716502) （2023YFB3812000,2021YFA0716502）
