BaZrO3掺杂对(K0.49Na0.51)0.98Li0.02(Nb0.77Ta0.18Sb0.05)O3无铅压电陶瓷的结构与电性能的影响

doi:10.3724/SP.J.1077.2013.12402

无机材料学报 ›› 2013, Vol. 28 ›› Issue (06): 629-634.DOI: 10.3724/SP.J.1077.2013.12402

BaZrO₃掺杂对(K_0.49Na_0.51)_0.98Li_0.02(Nb_0.77Ta_0.18Sb_0.05)O₃无铅压电陶瓷的结构与电性能的影响

李月明1, 肖祖贵1,2, 沈宗洋1, 王竹梅1, 洪燕¹, 潘铁政², 吴芬¹

(1.景德镇陶瓷学院材料科学与工程学院, 江西省先进陶瓷材料重点实验室, 景德镇 333403; 2. 昆山攀特电陶科技有限公司, 昆山 215300)

收稿日期:2012-06-28 修回日期:2012-10-08 出版日期:2013-06-20 网络出版日期:2013-05-20
基金资助:
国家自然科学基金(51262011, 50962007, 51102121); 江西省自然科学基金(20114BAB206023); 江西省主要学科学术和技术带头人培养计划(2010DD01100); 江西省教育厅科技项目(GJJ12508); 景德镇市学科带头人项目

Effect of BaZrO₃ Depant on the Structure and Electric Properties of (K_0.49Na_0.51)_0.98Li_0.02(Nb_0.77Ta_0.18Sb_0.05)O₃ Lead-free Piezoceramics

LI Yue-Ming¹, XIAO Zu-Gui^1,2, SHEN Zong-Yang¹, WANG Zhu-Mei¹, HONG Yan¹, PAN Tie-Zheng², Wu Fen¹

(1. School of Materials Science and Engineering, Jingdezhen Ceramic Institute; Jiangxi Key Laboratory of Advanced Ceramic Materials, Jingdezhen 333403, China; 2. Kunshan PANT Piezoelectric Technology Corporation Limited, Kunshan 215300, China)

Received:2012-06-28 Revised:2012-10-08 Published:2013-06-20 Online:2013-05-20
Supported by:
National Natural Science Foundation of China (51262011, 50962007, 51102121); Jiangxi Provincial Natural Science Foundation of China (20114BAB206023); Jiangxi Provincial Major Disciplines of Academic and Technical Leaders Project (2010DD01100); Project of Science and Technology of Jiangxi Provincial Department of Education (GJJ12508); Project of Disciplines Leaders of Jingdezhen

摘要/Abstract

摘要： 采用固相反应法制备了(K_0.49Na_0.51)_0.98Li_0.02(Nb_0.77Ta_0.18Sb_0.05)O₃-xBaZrO₃ (NKNLST-xBZ, x = 0~0.020 mol)无铅压电陶瓷, 系统研究了BaZrO₃的掺杂量对陶瓷的压电、介电、机电和铁电性能的影响。结果表明: 随着BaZrO₃掺杂量x的增加, 陶瓷的晶体结构由正交相向四方相转变, 在x=0.005~0.008区间出现正交相与四方相两相共存的区域, 在此区域内陶瓷的晶粒变得细小且均匀, 介电损耗tanδ大幅降低, 压电常数d₃₃和平面机电耦合系数k_p增加。该体系陶瓷的介电常数ε T 33 /ε0则随着BaZrO₃的增加持续增加, 相变温度则向低温方向移动。当x=0.005时, 该组成陶瓷具有最佳的综合性能: 压电常数d33=372 pC/N, 平面机电耦合系数kp=47.2%, 介电损耗tanδ=3.1%, 以及较高的介电常数ε^T₃₃ /ε₀=1470和居里温度T_c=208℃。

关键词: 铌酸钾钠, 锆酸钡, 无铅压电陶瓷, 钙钛矿

Abstract: (K_0.45Na_0.55)_0.98Li_0.02(Nb_0.77Ta_0.18Sb_0.05)O₃-xBaZrO₃ (NKNLST-xBZ, x = 0–0.020 mol) lead-free piezoelectric ceramics were prepared by solid state reaction method. The effect of BaZrO₃ doping amount on the piezoelectric, dielectric, electromechanical and ferroelectric properties were investigated systematically. The results revealed that the crystal structures transformed from orthorhombic phase to tetragonal phase with BaZrO₃doping amount increasing, and the coexistence of orthorhombic-tetragonal phases were observed in the x range from 0.005 to 0.008. Under the condition of two phases co-existence, the ceramic grain became small and uniform and dielectric loss tanδ significantly decreased, while the piezoelectric constant d₃₃ and planar electro-mechanical coupling factor kp increased. The dielectric constant ε^T₃₃ /ε₀ of this system ceramics increased continuously with the increase of the BaZrO₃ doping amount and the phase transition temperatures shifted to lower temperature. The optimized piezoelectric properties could be obtained at the x = 0.005 composition ceramic as follows: the piezoelectric constant d₃₃ = 372 pC/N, planar electromechanical coupling coefficient k_p = 47.2%, dielectric loss tanδ = 3.1%, a high dielectric constant ε^T₃₃ /ε₀ = 1470 and Curie temperature T_c=208℃.

Key words: sodium potassium niobate, barium zirconate, lead-free piezoelectric ceramics, perovskite

中图分类号:

TQ174

李月明, 肖祖贵, 沈宗洋, 王竹梅, 洪燕, 潘铁政, 吴芬. BaZrO₃掺杂对(K_0.49Na_0.51)_0.98Li_0.02(Nb_0.77Ta_0.18Sb_0.05)O₃无铅压电陶瓷的结构与电性能的影响[J]. 无机材料学报, 2013, 28(06): 629-634.

LI Yue-Ming, XIAO Zu-Gui, SHEN Zong-Yang, WANG Zhu-Mei, HONG Yan, PAN Tie-Zheng, Wu Fen. Effect of BaZrO₃ Depant on the Structure and Electric Properties of (K_0.49Na_0.51)_0.98Li_0.02(Nb_0.77Ta_0.18Sb_0.05)O₃ Lead-free Piezoceramics[J]. Journal of Inorganic Materials, 2013, 28(06): 629-634.

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BaZrO₃掺杂对(K_0.49Na_0.51)_0.98Li_0.02(Nb_0.77Ta_0.18Sb_0.05)O₃无铅压电陶瓷的结构与电性能的影响

Effect of BaZrO₃ Depant on the Structure and Electric Properties of (K_0.49Na_0.51)_0.98Li_0.02(Nb_0.77Ta_0.18Sb_0.05)O₃ Lead-free Piezoceramics

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