0.84(K0.48Na0.52)NbO3-0.16K0.56Li0.38NbO2.97无铅压电陶瓷的多层膜工艺研究

doi:10.3724/SP.J.1077.2014.12718

无机材料学报 ›› 2014, Vol. 29 ›› Issue (1): 23-27.DOI: 10.3724/SP.J.1077.2014.12718

0.84(K_0.48Na_0.52)NbO₃-0.16K_0.56Li_0.38NbO_2.97无铅压电陶瓷的多层膜工艺研究

张志强^1,2, 刘志甫¹, 李永祥¹

(1. 中国科学院上海硅酸盐研究所, 上海 200050; 2. 中国科学院大学, 北京 100049)

收稿日期:2012-11-29 修回日期:2013-02-21 出版日期:2014-01-20 网络出版日期:2013-12-09
作者简介:张志强(1988-), 男, 博士研究生. E-mail: zhiqiang@student.sic.ac.cn
基金资助:
科技部973计划项目(2009CB623305); 上海市优秀学科带头人(10XD1404700)

Preparation of 0.84(K_0.48Na_0.52)NbO₃-0.16K_0.56Li_0.38NbO_2.97 Lead-free Piezoelectric Ceramics by Multi-layer Process

ZHANG Zhi-Qiang^{1, 2}, LIU Zhi-Fu¹, LI Yong-Xiang¹

(1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China)

Received:2012-11-29 Revised:2013-02-21 Published:2014-01-20 Online:2013-12-09
About author:ZHANG Zhi-Qiang.
Supported by:
973-Project (2009CB623305); The Science & Technology Commission of Shanghai Municipality (10XD1404700)

摘要/Abstract

摘要： 采用多层膜工艺制备了0.84(K_0.48Na_0.52)NbO₃-0.16K_0.56Li_0.38NbO_2.97无铅压电陶瓷, 研究了不同烧结温度和保温时间对陶瓷的密度、物相、微观形貌以及介电和压电性能的影响。结果表明, 所有烧结条件下得到的陶瓷都是钙钛矿结构和少量钨青铜结构的混合相, 而且室温下陶瓷都处于多型相变区域。1050℃烧结8 min得到的陶瓷断面晶粒均匀, 相对密度达到95%以上, 并且获得最优的介电和压电性能: 介电常数为ε_r=618, 介电损耗为tanδ=0.027, 压电常数为d₃₃=112 pC/N。与传统制备工艺相比, 多层膜工艺大大降低了烧结温度, 缩短了烧结时间, 有效地抑制了K、Na的挥发。

关键词: 铌酸钾钠, 无铅压电陶瓷, 多层膜工艺, 多型相变

Abstract: 0.84(K_0.48Na_0.52)NbO_2.97-0.16K_0.56Li_0.38NbO_2.97 lead-free piezoelectric ceramics were prepared by multi-layer process. Effects of sintering temperature and holding time on the density, crystal structure, microstructure, dielectric, and piezoelectric properties of the ceramics were investigated. All the ceramics exhibit a coexistence of perovskite and tungsten bronze structure. The ceramics sintered at 1050℃ for 8 min exhibit the largest relative density up to 95%, and the optimized dielectric constant, dielectric loss, and piezoelectric constant of ε_r=618, tanδ=0.027, and d₃₃=112 pC/N, respectively. Moreover, the volatilization of K and Na is inhibited due to the lower sintering temperature and much shorter holding time of the multi-layer process.

Key words: potassium-sodium niobate, lead-free piezoelectric ceramics, multi-layer process, polymorphic phase transition

中图分类号:

TQ174

张志强, 刘志甫, 李永祥. 0.84(K_0.48Na_0.52)NbO₃-0.16K_0.56Li_0.38NbO_2.97无铅压电陶瓷的多层膜工艺研究[J]. 无机材料学报, 2014, 29(1): 23-27.

ZHANG Zhi-Qiang, LIU Zhi-Fu, LI Yong-Xiang. Preparation of 0.84(K_0.48Na_0.52)NbO₃-0.16K_0.56Li_0.38NbO_2.97 Lead-free Piezoelectric Ceramics by Multi-layer Process[J]. Journal of Inorganic Materials, 2014, 29(1): 23-27.

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0.84(K_0.48Na_0.52)NbO₃-0.16K_0.56Li_0.38NbO_2.97无铅压电陶瓷的多层膜工艺研究

Preparation of 0.84(K_0.48Na_0.52)NbO₃-0.16K_0.56Li_0.38NbO_2.97 Lead-free Piezoelectric Ceramics by Multi-layer Process

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