| LiNbO3掺杂(Bi0.5Na0.5)TiO3-(Bi0.5K0.5)TiO3-BaTiO3无铅压电陶瓷的压电和铁电性能研究 |
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| 引用本文： | 孙涛,阮丁山,张孝文,戴叶婧.LiNbO3掺杂(Bi0.5Na0.5)TiO3-(Bi0.5K0.5)TiO3-BaTiO3无铅压电陶瓷的压电和铁电性能研究[J].稀有金属材料与工程,2011(Z1):402-404. |
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| 作者姓名： | 孙涛 阮丁山 张孝文 戴叶婧 |
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| 作者单位： | 天津大学先进陶瓷与加工技术教育部重点实验室;清华大学新型陶瓷与精细工艺国家重点实验室 |
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| 基金项目： | 天津大学自主创新项目;教育部博士点基金(20100032120020) |
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| 摘 要： | 用传统的固相反应法将LiNbO3(LN)加入(Bi0.5Na0.5)TiO3-(Bi0.5K0.5)TiO3-BaTiO3制得无铅压电陶瓷。研究了该复合体系的压电和铁电性能,着重研究加入LiNbO3对0.852BNT-0.110BKT-0.038BT这一组分的相结构和电性能影响。加LN形成的材料结构分析(XRD)表明,LiNbO3能完全固溶入钙钛矿结构。加入0.05LN导致弥散相变,材料由四方相和菱方相两相共存转变为伪立方相,电滞回线呈现顺电相的特征。加入0.02LN形成的四元系电性能最佳:压电常数d33=245pC/N,机电耦合系数kp=0.20,kt=0.495,室温介电常数εr=1502,剩余极化强度Pr=26μC/cm2。在此基础上,研究了复合LN对去极化温度Td的作用,结果表明,引入LN会降低这一体系的去极化温度。
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| 关 键 词： | BNBK基 无铅陶瓷 去极化温度 |
Piezoelectric and Ferroelectric Properties of LiNbO3-Doped (Bi0.5Na0.5)TiO3- (Bi0.5K0.5)TiO3-BaTiO3 Lead-Free Piezoelectric Ceramics |
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| Sun Tao,Ruan Dingshan,Zhang Xiaowen,Dai Yejing.Piezoelectric and Ferroelectric Properties of LiNbO3-Doped (Bi0.5Na0.5)TiO3- (Bi0.5K0.5)TiO3-BaTiO3 Lead-Free Piezoelectric Ceramics[J].Rare Metal Materials and Engineering,2011(Z1):402-404. |
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| Authors: | Sun Tao Ruan Dingshan Zhang Xiaowen Dai Yejing |
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| Affiliation: | 1 (1. Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin University, Tianjin 300072, China) (2. State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China) |
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| Abstract: | The piezoelectric and ferroelectric properties of (1-x)0.852(Bi0.5Na0.5)TiO3-0.110(Bi0.5K0.5)TiO3-0.038BaTiO3]-xLiNbO3 (x=0,0.02 and 0.05, abbreviated as BNBK-LN) lead-free piezoelectric ceramics were prepared by conventional ceramic processing. The X-ray diffraction (XRD) on the samples reveals that Li+ and Nb5+ ions diffuse into the Bi0.5Na0.5TiO3 (BNT) lattices (A-site and B-site) and form a solid solution with a single perovskite structure. All the samples could be sintered at 1160 °C, with density being on the order of >95%. The ceramics with x=0.02 exhibit the highest properties, with piezoelectric coefficient being on the order of d33=245 pC/N, while the electromechanical coupling factors are found to be kp=0.20 and kt=0.495, respectively. The dielectric, pyroelectric, electromechanical and ferroelectric behaviors were investigated as a function of temperature. It is found that the depolarization temperature Td shows a strong dependence on the content of LiNbO3 addition, shifting to lower temperature with doping. |
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| Keywords: | BNBK-based lead-free Td |
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