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无机材料学报

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Li改性铌钽酸钾钠无铅压电陶瓷的研究

江向平1, 胡晓萍1,2, 江福兰1, 刘晓冬2, 殷庆瑞3   

  1. 1. 景德镇陶瓷学院材料工程系, 景德镇 333001; 2. 东华理工学院材料工程系, 抚州 344000; 3. 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:2006-06-21 修回日期:2006-10-09 出版日期:2007-05-20 网络出版日期:2007-05-20

Li-modified Sodium Potassium Tantalum Niobate Lead-freePiezoelectric Ceramics

JIANG Xiang-Ping 1, HU Xiao-Ping 1,2, JIANG Fu-Lan1, LIU Xiao-Dong2, YIN Qin-Rui3   

  1. 1. Department of Material Science, Jingdezhen Ceramic Institute, Jingdezhen 333001, China; 2. Dpartment of Material Science and Engineering, East China Institute of Technology, Fuzhou 344000, China; 3. State Key Laboratory of High Performance Ceramics and Superfine Structure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2006-06-21 Revised:2006-10-09 Published:2007-05-20 Online:2007-05-20

PDF (PC)

1970

被引次数

23

摘要： 利用固相反应法制备了(Na 0.52 K 0.48-x Li x)(Nb 0.86 Ta 0.10 Sb 0.04)O 3系无铅压电陶瓷, 研究了不同Li含量(x分别为0、0.02、0.04、0.06、0.08)样品的显微结构、物相组成及电性能. 结果表明, Li含量的改变对其物相组成、压电性能、铁电性能、介电性能都有显著影响. 当Li含量x从0增大到0.04时, 其压电性能相应提高, 当Li含量x超过0.04时, 压电性能明显下降; 在x=0.04时综合性能最好, 其压电常数d33高达260pC/N, 介电损耗tanδ为0.027, 平面机电耦合系数kp值达到50%, 剩余极化强度Pr为22μC·cm-2, 矫顽电场Ec为0.95kV·mm-1, 居里温度为316℃. 另外, 随着Li含量增加, 该系统的矫顽电场明显增强, 居里温度有所提高.

关键词: 铌钽酸钾钠, 无铅压电陶瓷, 压电性能, 铁电性能, 介电性能

Abstract: Lead-free piezoelectric(Na 0.52 K 0.48-x Li x)(Nb 0.86 Ta 0.10 Sb 0.04)O3 ceramics were prepared by solid state reaction. The microstructure, phase and electric properties were studied for (Na 0.52 K 0.48-x Li x )(Nb 0.86 Ta 0.10 Sb 0.04 )O3 samples with different Li content (x being 0, 0.02, 0.04, 0.06, 0.08). Results show that their phases, piezoelectric, dielectric and ferroelectric properties of (Na 0.52 K 0.48-x Li x)(Nb 0.86 Ta 0.10 -Sb 0.04) O3 lead-free ceramics are μch influenced by the content of Li ions. The piezoelectric properties are enhanced when Li content increases from 0 to 0.04, and decreased when Li content (x) is more than 0.04. Best electric properties are obtained for the sample when x equals 0.04,with its piezoelectric constant d33 being 260pC/N, dielectric loss tanδ being 0.027, planar coupling factor k p being 50%, remanent polarization P r being 22μC·cm-2, coercive electric field E c being 0.95kV·mm-1, Curie temperature being 316℃. With the increase of Li content, the coercive electric field E c increases obviously, and the Curie temperature is also enhanced.

Key words: sodium potassium tantalum niobate, lead-free piezoelectric ceramics, piezoelectric properties, ferroelectric properties, dielectric properties

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