无机材料学报 ›› 2018, Vol. 33 ›› Issue (11): 1248-1252.doi: 10.15541/jim20180140

• • 上一篇    下一篇

过量Nb2O5对偏铌酸铅压电陶瓷烧结性能和电学性能的影响

夏标军1,2,3, 周志勇1(), 董显林1,4()   

  1. 1. 中国科学院 上海硅酸盐研究所, 无机功能材料与器件实验室 上海 200050
    2. 中国科学院大学,北京100049
    3. 上海科技大学, 上海 201210
    4. 中国科学院 上海硅酸盐研究所, 高性能陶瓷和超微结构国家重点实验室, 上海 200050
  • 收稿日期:2018-04-02 出版日期:2018-11-16 发布日期:2018-10-20
  • 作者简介:

    作者简介: 刘 娇(1995-), 女, 硕士研究生. E-mail: 907156479@qq.com

Effect of Excessive Nb2O5 on the Sintering and Electrical Property of Lead Metaniobate Piezoelectric Ceramics

Biao-Jun XIA1,2,3, Zhi-Yong ZHOU1(), Xian-Lin DONG1,4()   

  1. 1. Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
    3. Shanghai Tech University, Shanghai 201210, China
    4. State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2018-04-02 Online:2018-11-16 Published:2018-10-20
  • About author:XIA Biao-Jun(1990?), male, candidate of Master degree. E-mail: xiabj@shanghaitech.edu.cn

摘要:

采用传统的固相烧结法制备了组成为PbNb2O6-xmol%Nb2O5(x=0, 5, 10, 15, 20)的压电陶瓷样品, 研究了过量Nb2O5对PbNb2O6压电陶瓷烧结性能和电学性能的影响。研究结果表明, 过量Nb2O5能够在保证PbNb2O6高居里温度和明显各向异性的条件下改善其烧结性能和电学性能。这可能是因为过量Nb2O5导致PbNb2O6中Nb-O八面体的扭曲, 进而抑制PbNb2O6在烧结过程中的三方到四方相变。随着过量Nb2O5加入到PbNb2O6中, 其压电系数(d33)和致密度都明显提高了, 并且在过量5mol% Nb2O5时达到最大值, 分别为69 pC/N和93.1%。

关键词: PN, 压电陶瓷, Nb2O5, 压电性能, 钨青铜

Abstract:

PbNb2O6-xmol%Nb2O5 (PN-x=0, 5, 10, 15, 20) Piezoelectric ceramics were prepared by solid-state reaction method. The effects of excess Nb2O5 on the sintering and electrical properties of PbNb2O6 ceramics were investigated. The sintering and electrical properties were evidently improved after the addition of Nb2O5 into PN in the condition set for a high Tc and high coupling anisotropy. The improvement may originate from NbO6 octahedral distortion by excess Nb2O5, which prevents phase transition from rhombohedral to tetragonal during the sintering process. With excess addition of Nb2O5, the piezoelectric coefficient (d33) and relative density of PN ceramics increased and reached up to 69 pC/N and 93.1%, respectively, at 5mol% addition of Nb2O5.

Key words: PbNb2O6, piezoceramics, Nb2O5, piezoelectric property, tungsten bronze

中图分类号: 

  • TQ174