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无机材料学报

无机材料学报 ›› 2013, Vol. 28 ›› Issue (3): 321-325.DOI: 10.3724/SP.J.1077.2013.12229 CSTR: 32189.14.SP.J.1077.2013.12229

• 研究论文 • 上一篇    下一篇

LiSbO3含量对BiMnO3掺杂K0.5Na0.5NbO3陶瓷的结构与压电性能的影响研究

江民红1,2, 刘心宇1, 2, 陈国华1, 朱归胜1, 许积文1, 马家峰2   

  1. (1. 桂林电子科技大学 广西信息材料重点实验室, 桂林 541004; 2. 中南大学 材料科学与工程学院, 长沙 410083)
  • 收稿日期:2012-04-12 修回日期:2012-06-25 出版日期:2013-03-20 网络出版日期:2013-02-20
  • 基金资助:

    国家自然科学基金(51102056); 广西自然科学基金(2011GXNSFB018008, 2012GXNSFGA060002); 广西高校优秀人才资助计划; 广西教育厅科研项目(201012MS085)

Effect of LiSbO3 Content on the Microstructure and Piezoelectric Properties of K0.5Na0.5NbO3 Lead-free Ceramics Doped with BiMnO3

JIANG Min-Hong1, 2, LIU Xin-Yu1, 2, CHEN Guo-Hua1, ZHU Gui-Sheng1, XU Ji-Wen1, MA Jia-Feng2   

  1. (1. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China;    2. College of Material Science and Engineering, Central South University, Changsha 410083, China)
  • Received:2012-04-12 Revised:2012-06-25 Published:2013-03-20 Online:2013-02-20
  • Supported by:

    National Natural Science Foundation of China (51102056); Natural Science Foundation of Guangxi Province (2011GXNSFB018008, 2012GXNSFGA060002); Program for Excellent Talents in Guangxi Higher Education Institutions; Research Program of Guangxi Education Department (201012MS085)

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摘要： 采用传统陶瓷常压烧结工艺制备(0.996–x)KNN-0.004BM-xLS(x=0、0.01、0.02、0.03、0.04、0.05、0.06)无铅压电陶瓷, 着重研究了LS的含量对(0.996–x)KNN-0.004BM-xLS陶瓷相结构和压电性能的影响。结果表明, 当x≤0.02时, 陶瓷具有单一的正交相结构; 当0.03≤x≤0.05时, 陶瓷具有正交相与四方相共存的过渡结构; 当x=0.06时, 陶瓷具有单一的四方相结构。陶瓷的MPB成分范围在0.03≤x≤0.05。随着LS含量的增加, 陶瓷材料的d33和kp均先增加后减小, 当x=0.05时, 均达到最大值, 分别为230 pC/N和0.42; 陶瓷的To-t和Tc均向低温方向移动; 当x=0时, 陶瓷的To-t和Tc分别为455和215℃; 当x=0.02时, 陶瓷的To-t和Tc分别为385和150℃; 当x=0.06时, To-t和Tc分别降至370℃和75℃。

关键词: 无铅压电陶瓷, K0.5Na0.5NbO3, BiMnO3, LiSbO3, 压电性能

Abstract: Lead-free (0.996–x)KNN-0.004BM-xLS (x=0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06) ceramics were prepared by the traditional ceramic sintering processing. The effect of LS content on the microstructure and piezoelectric properties of KNN-BM lead-free ceramics was investigated. The results show that the ceramics have a single orthorhombic phase structure when x≤0.02, a co-existed phases orthorhombic and tetragonal phases structure at 0.03≤x≤0.05, and a single tetragonal phase structure at x=0.06. The morphotropic phase boundary (MPB) for the ceramics is identified in the composition range of 0.03≤x≤0.05. With increasing the LS content, both d33 and kp of the ceramics firstly increase and then decrease. At x=0.05, d33 and kp reach their maximum values which are 230 pC/N and 0.42, respectively. The To-t and Tc of the ceramics shift to the low temperature with the increasing of the LS content. The To-t and Tc of the ceramics are 455 and 215℃ at x=0, 385 and 150℃ at x=0.02, 370 and 75℃ at x=0.06, respectively.

Key words: lead-free piezoelectric ceramics, K0.5Na0.5NbO3, BiMnO3, LiSbO3, piezoelectric property

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