首页|BF-PT-BZT三元系高温压电陶瓷的介电压电温度稳定性

BF-PT-BZT三元系高温压电陶瓷的介电压电温度稳定性

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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.
Dielectric and Piezoelectric Temperature Stability of BF-PT-BZT Ternary High Temperature Piezoelectric Ceramics
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.

BF-PT-BZT ternary ceramicsCurie temperaturedielectric constantpiezoelectric propertiesther-mal stability

杜嘉诚、田聪聪、王永晨、陈建国、赵慧、王艳、程晋荣

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上海大学 材料科学与工程学院,上海 200444

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

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

水声对抗技术重点实验室开放基金资助项目上海市自然科学基金原创探索基金资助项目青年科学家基金国家自然科学基金国家自然科学基金

JCKY2020207CH0222ZR14811001220430051872180

2024

10.11977/j.issn.1004-2474.2024.01.007

压电与声光
四川压电与声光技术研究所

压电与声光

CSTPCD北大核心
影响因子：0.357
ISSN：1004-2474
年,卷(期)：2024.46(1)
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