BF-PT-BZT三元系高温压电陶瓷的介电压电温度稳定性
Dielectric and Piezoelectric Temperature Stability of BF-PT-BZT Ternary High Temperature Piezoelectric Ceramics
杜嘉诚 1田聪聪 1王永晨 1陈建国 1赵慧 2王艳 2程晋荣1
作者信息
- 1. 上海大学 材料科学与工程学院,上海 200444
- 2. 上海船舶电子设备研究所 水声对抗技术全国重点实验室,上海 201108
- 折叠
摘要
采用传统固相反应法制备0.54BiFeO3-0.33PbTiO3-0.13Ba(ZrxTi1-x)O3(BF-0.33PT-0.13Ba(ZrxTi1-x),0.4≤x≤0.8)三元系压电陶瓷,研究了Zr含量(x)对陶瓷的微观结构以及介电、铁电和压电性能的影响.X线衍射(XRD)结果表明,BF-0.33PT-0.13Ba(ZrxTi1-x)三元系陶瓷为单一钙钛矿结构,当0.4≤x≤0.7时,陶瓷相结构为三方-四方相共存;当x=0.8时,陶瓷为三方相结构.扫描电子显微镜(SEM)结果表明,随着Zr含量的增加,陶瓷晶粒尺寸逐渐增加.在25～400℃时,陶瓷的压电常数d33 的波动小于±6%.当x=0.7时,BF-0.33PT-0.13Ba(ZrxTi1-x)具有最优异的综合性能,其介电常数εr、居里温度TC、压电常数d33 分别为1 194(1 kHz)、438℃和330 pC/N,在25～300℃时,陶瓷的电容温度系数和压电常数变化率分别为16%和8%.结果表明,BF-0.33PT-0.13Ba(Zr0.7Ti0.3)陶瓷在高温压电器件中具有较广的应用前景.
Abstract
The ternary piezoelectric ceramics of 0.54BiFeO3-0.33PbTiO3-0.13Ba(ZrxTi1-x)O3(BF-0.33PT-0.13 Ba(ZrxTi1-x),0.4≤x≤0.8)were prepared by traditional solid-state reaction method and the effects of Zr content(x)on microstructure,dielectric,ferroelectric and piezoelectric properties of ceramics were investigated.X-ray diffraction results show that BF-0.33PT-0.13Ba(ZrxTi1-x)ternary ceramics display a single perovskite struc-ture.When 0.4≤x≤0.7,the ceramic phase structure is tetragonal phase and rhombohedral phase coexist.When x=0.8,the ceramic has a triangular phase structure.Scanning electron microscopy(SEM)images show that the grain size increases with the increase of Zr content.The fluctuation of piezoelectric coefficient d33 of ceramics is less than±6%at 25-400℃.When x=0.7,BF-0.33PT-0.13Ba(ZrxTi1-x)has the best comprehensive properties,and the dielectric constant εr,Curie temperature TC and piezoelectric constant d33 of the ceramics are 1 194(1 kHz),438℃ and 330 pC/N,respectively.The capacitance temperature coefficient and the change rate of piezoe-lectric constant d33 are 16%and 8%at 25-300℃,respectively.These results indicate that BF-0.33PT-0.13Ba(Zr0.7Ti0.3)ceramics have promising applications in high-temperature piezoelectric devices.
关键词
BF-PT-BZT三元系陶瓷/居里温度/介电常数/压电性能/温度稳定性Key words
BF-PT-BZT ternary ceramics/Curie temperature/dielectric constant/piezoelectric properties/ther-mal stability引用本文复制引用
基金项目
水声对抗技术重点实验室开放基金资助项目(JCKY2020207CH02)
上海市自然科学基金原创探索基金资助项目(22ZR1481100)
青年科学家基金()
国家自然科学基金(12204300)
国家自然科学基金(51872180)
出版年
2024
NETL
NSTL
万方数据