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材料导报  2020, Vol. 34 Issue (20): 20010-20014    https://doi.org/10.11896/cldb.19040065
  无机非金属及其复合材料 |
高TC、高性能压电陶瓷BNT-PZT的制备及微观机制
季万万1, 张帅1, 陆小龙1, 方必军1, 丁建宁1,2
1 常州大学材料科学与工程学院,材料科学与工程国家级实验教学示范中心,江苏省光伏科学与工程协同创新中心,常州 213164
2 江苏大学机械工程学院,镇江 212013
Preparation and Micro-mechanism of High-TC and High Performance Piezoelectric Ceramics BNT-PZT
JI Wanwan1, ZHANG Shuai1, LU Xiaolong1, FANG Bijun1, DING Jianning1,2
1 School of Materials Science and Engineering, National Experimental Demonstration Center for Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University, Changzhou 213164, China
2 School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China
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摘要 随着科学技术的进步,能源、航天等领域对高居里温度(TC)、高性能、高稳定性压电器件有极大的需求。本工作通过固相法制备高TC压电陶瓷Bi(Ni1/2Ti1/2)O3-Pb(Zr1/2Ti1/2)O3(BNT-PZT)。通过工艺优化和组分调整发现,1 090 ℃烧结2 h制备的准同型相界(MPB)附近组成的0.25Bi-(Ni1/2Ti1/2)O3-0.75Pb(Zr1/2Ti1/2)O3(0.25BNT-0.75PZT)陶瓷呈现出最佳的电学性能,且在TC以下具有很好的热稳定性:εm=18 944,TC=220.1 ℃,d33*=487.6 pm/V,d33=510 pC/N,Kp=59.8%。利用升温拉曼光谱研究了0.25BNT-0.75PZT陶瓷的铁电相变机理,发现陶瓷中存在低对称性极性纳米微区或多相共存;电子背散射(EBSD)分析证明0.25BNT-0.75PZT陶瓷的微区相结构为三方相和四方相共存。低对称性极性纳米微区或多相共存导致晶格畸变和极化旋转的能垒降低,使得MPB附近的0.25BNT-0.75PZT陶瓷具有优异的电学性能。
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季万万
张帅
陆小龙
方必军
丁建宁
关键词:  钛镍酸铋-锆钛酸铅(BNT-PZT)  电学性能  铁电相变  拉曼光谱  电子背散射    
Abstract: With the progress of science and technology, piezoelectric devices with high Curie-temperature (TC), excellent performance and high temperature stability are dramatically required in energy industry, aerospace industry and related fields. High TC piezoelectric ceramics Bi-(Ni1/2Ti1/2) O3-Pb (Zr1/2Ti1/2) O3 (BNT-PZT) were prepared by the solid-state method in this work. Via sintering processing optimization and composition selection, 0.25Bi (Ni1/2Ti1/2) O3-0.75Pb (Zr1/2Ti1/2) O3 (0.25BNT-0.75PZT) ceramics with composition around the morphotropic phase boundary (MPB) sintered at 1 090 ℃ for 2 h present excellent electrical performance and high stability below the TC temperatures, in which εm=18 944, TC=220.1 ℃, d33*=487.6 pm/V, d33=510 pC/N and Kp=59.8%. The ferroelectric phase transition mechanism of the 0.25BNT-0.75PZT ceramics was studied by temperature dependent Raman spectroscopy. Based on which low symmetric polar nano-regions or multi-phases coexistence is discovered. Electron back-scattered diffraction (EBSD) also discloses the existence of rhombohedral and tetragonal phases in micro-regions in the 0.25BNT-0.75PZT ceramics. The low symmetric polar nano-regions or multi-phases coexistence reduces the energy barrier of the crystalline lattice distortion and polarization rotation, contributing to the excellent electrical properties of the 0.25BNT-0.75PZT ceramics around MPB.
Key words:  BNT-PZT    electrical properties    ferroelectric phase transition    Raman spectroscopy    electron back-scattered diffraction (EBSD)
               出版日期:  2020-10-25      发布日期:  2020-11-06
ZTFLH:  TQ174.75  
基金资助: 国家自然科学基金(51577015);江苏高校品牌专业建设工程;江苏高校优势学科建设工程
通讯作者:  fangbj@cczu.edu.cn   
作者简介:  季万万,硕士,2019年于常州大学获得硕士学位,主要从事高居里温度压电陶瓷研究。
方必军,常州大学教授。2002年于中国科学院上海硅酸盐研究所获得博士学位。主要从事压电铁电陶瓷晶体材料与器件、纳米功能材料和溶剂热合成的研究。
引用本文:    
季万万, 张帅, 陆小龙, 方必军, 丁建宁. 高TC、高性能压电陶瓷BNT-PZT的制备及微观机制[J]. 材料导报, 2020, 34(20): 20010-20014.
JI Wanwan, ZHANG Shuai, LU Xiaolong, FANG Bijun, DING Jianning. Preparation and Micro-mechanism of High-TC and High Performance Piezoelectric Ceramics BNT-PZT. Materials Reports, 2020, 34(20): 20010-20014.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.19040065  或          http://www.mater-rep.com/CN/Y2020/V34/I20/20010
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