0.06BiYbO3-0.94Pb(Zr0.48Ti0.52)O3三元系压电陶瓷的氧化物掺杂改性研究

摘要/Abstract

摘要： 针对新一代声波测井仪器对其核心元件压电陶瓷兼具高居里温度、高压电系数以及高稳定性要求的迫切需求,本文采用传统的固相反应-无压烧结技术制备了一种0.06BiYbO₃-0.94Pb(Zr_0.48Ti_0.52)O₃(BY-PZT)三元系压电陶瓷,并研究了四种氧化物掺杂对其微观结构及电学性能的影响。由XRD和SEM表征可知所有样品均呈纯四方相钙钛矿结构,掺杂Cr₂O₃的样品平均晶粒尺寸最大。介电温谱和谐振频谱研究证实四种氧化物掺杂均能提高其介电性能的温度稳定性。掺杂La₂O₃的样品介电常数温度系数(Tk_ε)最低,掺杂MnO₂的样品机械品质因素(Q_m)最高,而掺杂CeO₂的样品抗热退极化性能最好。高温复阻抗(Cole-Cole图)分析表明,Cr₂O₃掺杂能够显著提高BY-PZT陶瓷的高温电阻率,陶瓷在高温下的电导行为主要由晶界响应控制。综合来看,掺杂La₂O₃的样品兼具高居里温度(T_C=397 ℃)和高压电系数(d₃₃=290 pC/N),并且在300 ℃退火4 h后d₃₃仍能保持在270 pC/N左右,有望在极限工作温度为300 ℃的高温压电器件中获得应用。

关键词: BY-PZT, 压电陶瓷, 氧化物掺杂, 温度稳定性, 压电性能, 热退极化, 介电性能

Abstract: Aiming at the urgent demand of the new generation of sonic logging tools for their core components, piezoelectric ceramics, which have high Curie temperature, high voltage electrical coefficient and high stability, 0.06BiYbO₃-0.94Pb(Zr_0.48Ti_0.52)O₃(BY-PZT) ternary piezoceramics with addition of different oxide additives were prepared by traditional solid-state reaction method. The effects of oxide additives on the phase structures and electrical properties of the BY-PZT ternary piezoceramics were investigated. XRD and SEM analysis show that all samples are pure tetragonal perovskite structure. When doped with Cr₂O₃, the average grain size of the samples has a maximum value. Dielectric temperature spectrum and resonance spectrum analysis illustrated that doping of four kinds of oxide improved the temperature stability of dielectric properties respectively. The lanthanum-doped sample got the lowest temperature coefficient of dielectric constant (Tk_ε). The mechanical quality factor (Q_m) has a maximum value when MnO₂ are doped; but the samples doped with CeO₂ have the best thermal depolarization resistance. The analysis of high temperature complex impedance (Cole-Cole) shows that Cr₂O₃ doping significantly improve the high temperature resistivity of the ceramic. It is found that the electrical conduction behavior of the ceramics at high temperature is dominated by the grain-boundary response. The lanthanum-doped sample has both high Curie temperature (T_C=397 ℃) and high piezoelectric constant (d₃₃=290 pC/N), and after annealed at 300 ℃ for 4 h,the d₃₃ value of the sample still retains above 270 pC/N,which provides great promising for application in the high-temperature piezoelectric devices with an extreme operating temperature of 300 ℃.

Key words: BY-PZT, piezoceramics, oxide doping, temperature stability, piezoelectric property, thermal depoling, dielectric property

中图分类号:

TQ174

周治, 王艺颖, 周华将, 雷丽勤, 王金秀, 陈渝. 0.06BiYbO₃-0.94Pb(Zr_0.48Ti_0.52)O₃三元系压电陶瓷的氧化物掺杂改性研究[J]. 硅酸盐通报, 2022, 41(3): 1020-1030.

ZHOU Zhi, WANG Yiying, ZHOU Huajiang, LEI Liqin, WANG Jinxiu, CHEN Yu. Doping Effects of Oxides on 0.06BiYbO₃-0.94Pb(Zr_0.48Ti_0.52)O₃ Ternary Piezoceramics[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(3): 1020-1030.

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0.06BiYbO₃-0.94Pb(Zr_0.48Ti_0.52)O₃三元系压电陶瓷的氧化物掺杂改性研究

Doping Effects of Oxides on 0.06BiYbO₃-0.94Pb(Zr_0.48Ti_0.52)O₃ Ternary Piezoceramics

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