致密PZT95/5铁电陶瓷低温相结构与电性能研究

doi:10.3724/SP.J.1077.2013.12359

无机材料学报 ›› 2013, Vol. 28 ›› Issue (5): 502-506.DOI: 10.3724/SP.J.1077.2013.12359 CSTR: 32189.14.SP.J.1077.2013.12359

致密PZT95/5铁电陶瓷低温相结构与电性能研究

兰春锋¹, 聂恒昌¹, 陈学锋¹, 王军霞¹, 王根水¹, 董显林¹, 刘雨生², 贺红亮²

(1. 中国科学院上海硅酸盐研究所, 中国科学院无机功能材料与器件重点实验室, 上海200050; 2. 中国工程物理研究院流体物理研究所, 冲击波物理与爆轰物理重点实验室, 绵阳621900)

收稿日期:2012-05-30 修回日期:2012-09-12 出版日期:2013-05-10 网络出版日期:2013-04-22
作者简介:兰春锋(1985–), 男, 硕士研究生. E-mail: jas.lanzn@163.com
基金资助:
上海市基础研究项目支持(10DJ1400203) Shanghai Basic Research Program (10DJ1400203)

Research on Low-temperature Phase Structures and Electrical Properties of Dense PZT 95/5 Ferroelectric Ceramics

LAN Chun-Feng¹, NIE Heng-Chang¹, CHEN Xue-Feng¹, WANG Jun-Xia¹, WANG Gen-Shui¹, DONG Xian-Lin¹, LIU Yu-Sheng², HE Hong-Liang²

(1. Key Lab of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 2. National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China)

Received:2012-05-30 Revised:2012-09-12 Published:2013-05-10 Online:2013-04-22
About author:LAN Chun-Feng. E-mail: jas.lanzn@163.com

摘要/Abstract

摘要：

采用固相法制备了致密PZT95/5铁电陶瓷, 研究了低温下致密PZT95/5铁电陶瓷相结构和电性能的变化规律。变温X射线衍射(XRD)研究表明, 低温(-60℃)下极化和未极化致密PZT95/5铁电陶瓷相结构保持不变。电性能研究表明随着温度从30℃下降至-60℃, 致密PZT95/5铁电陶瓷的相对介电常数从278显著下降至173, 而电阻率和剩余极化强度基本保持不变。结合冲击波载荷下动态放电模拟分析, 发现相对介电常数的降低将引起动态电场增大至常温下的1.5倍, 这可能是导致致密PZT95/5铁电陶瓷低温下击穿概率显著增大的关键因素。

关键词: PZT95/5铁电陶瓷, 低温, 相结构, 电性能

Abstract:

Dense PZT 95/5 ferroelectric ceramics were fabricated by solid-state reaction method. Low-temperature phase structures and electrical properties of dense PZT 95/5 ferroelectric ceramics were investigated. X-ray diffraction (XRD) results show that the phases of both poled and unpoled dense PZT 95/5 ferroelectric ceramics almost keep unchanged at different temperature. The remanent polarization calculated from the pyroelectric current and the resistance of dense PZT 95/5 ferroelectric ceramics changes little at low temperature (-60℃). However, when the temperatue is reduced from 30℃ to -60℃, the relative dielectric constant dramatically decreases from 278 to 173. According to the dynamic discharge model analysis, the sharp decrease of dielectric constant results in the remarkable increase of dynamic electric field at -60℃ which is 1.5 times higher than that at room temperature. This could be the dominant reason for the high dielectric breakdown probability of dense PZT 95/5 ceramics at low temperature under shock wave loading.

Key words: PZT 95/5 ferroelectric ceramics, low temperature, phase structure, electrical properties

中图分类号:

TQ174

兰春锋, 聂恒昌, 陈学锋, 王军霞, 王根水, 董显林, 刘雨生, 贺红亮. 致密PZT95/5铁电陶瓷低温相结构与电性能研究[J]. 无机材料学报, 2013, 28(5): 502-506.

LAN Chun-Feng1, NIE Heng-Chang1, CHEN Xue-Feng, WANG Jun-Xia, WANG Gen-Shui, DONG Xian-Lin, LIU Yu-Sheng, HE Hong-Liang. Research on Low-temperature Phase Structures and Electrical Properties of Dense PZT 95/5 Ferroelectric Ceramics[J]. Journal of Inorganic Materials, 2013, 28(5): 502-506.

图/表 6

图1 不同温度下未极化致密PZT95/5铁电陶瓷的XRD图谱

Fig. 1 XRD patterns of unpoled dense PZT 95/5 ceramics at different temperatures

图2 不同温度下极化致密PZT95/5铁电陶瓷的XRD图谱

Fig. 2 XRD patterns of poled dense PZT 95/5 ceramics at different temperatures

图3 致密PZT95/5铁电陶瓷低温下电阻率与温度关系

Fig. 3 Temperature dependence of resistivity of dense PZT95/5 ferroelectric ceramics at low temperature

图4 致密PZT95/5铁电陶瓷介电常数和损耗随温度变化关系

Fig. 4 Permittivity and dielectric loss of dense PZT95/5 ceramics as a function of temperature

图5 冲击波下PZT95/5铁电陶瓷的放电模型[4]

Fig. 5 Discharge schematic diagram of PZT95/5 ferroelectric ceramics under shock impression[4]

图6 致密PZT95/5铁电陶瓷热释电系数随温度变化的关系

Fig. 6 Pyroelectric coefficient of dense PZT95/5 ferroelectric ceramics as a function of the temperature

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致密PZT95/5铁电陶瓷低温相结构与电性能研究

Research on Low-temperature Phase Structures and Electrical Properties of Dense PZT 95/5 Ferroelectric Ceramics

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