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Influence of La3+ Doping on Structure and Electrical Properties of CaBi2Nb2O9 Piezoceramics
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Liwei HUANG, Xiangping JIANG, Chao CHEN, Xiaokun HUANG, Xin NIE, Jingdong XU, Hepeng WANG, Zeyun JIANG
Journal of the Chinese Ceramic Society | 2021, 49(4) : 648 - 658
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Journal of the Chinese Ceramic Society | 2021, 49(4): 648-658
Influence of La3+ Doping on Structure and Electrical Properties of CaBi2Nb2O9 Piezoceramics
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Liwei HUANG, Xiangping JIANG, Chao CHEN, Xiaokun HUANG, Xin NIE, Jingdong XU, Hepeng WANG, Zeyun JIANG
Affiliations
  • Jiangxi Key Laboratory of Advanced Ceramic Materials, Department of Material Science and Engineering, Jingdezhen Ceramic Institude, Jingdezhen 333001, Jiangxi, China

    • HUANG Liwei (1994-), male, Master candidate. E-mail:

About Author:

HUANG Liwei (1994-), male, Master candidate. E-mail:

Published: 2021-04-20 doi: 10.14062/j.issn.0454-5648.20200827
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La3+-doped Ca1-xLaxBi2Nb2O9(CBN-xLa, x=0.00, 0.02, 0.04, 0.06, 0.08, 0.10) piezoceramics were synthesized by a solid-state reaction method. The crystal structure, microstructure, dielectric, piezoelectric and ferroelectric properties as well as high-temperature conductive mechanism of La3+-doped CBN ceramics were investigated. The results show that an appropriate amount of La3+ donor ion substituted for Ca2+ ion can optimize the crystal structure, decrease the grain size, reduce the oxygen vacancy, and effectively improve the electrical properties of CBN ceramics. The Ca0.92La0.08Bi2Nb2O9 ceramics with the optimal performance (high piezoelectric coefficient (d33=11.7 pC/N) and the Curie temperature (TC=905℃), remanent polarization (2Pr=9.51 μC/cm2) and low dielectric loss, (tanδ=3.87% at 550℃)). After annealing, the piezoelectric properties of all the samples remain stable at 800℃. According to the complex impedance plots, the grain boundary and grain both contribute the impedance, and the conduction mechanism is closely related to oxygen vacancies. Moreover, La3+-doping can effectively improve the resistivity of CBN ceramics at high temperatures, indicating a potential application in high-temperature sensors.

piezoceramics  /  microstructure  /  dielectric properties  /  ferroelectric properties  /  conductive mechanism  /  CaBi2Nb2O9
黄立伟, 江向平, 陈超, 黄枭坤, 聂鑫, 许经东, 王和鹏, 蒋泽云. La3+掺杂对CaBi2Nb2O9压电陶瓷结构与电学性能的影响. 硅酸盐学报, 2021 , 49 (4) : 648 -658 . DOI: 10.14062/j.issn.0454-5648.20200827
Liwei HUANG, Xiangping JIANG, Chao CHEN, Xiaokun HUANG, Xin NIE, Jingdong XU, Hepeng WANG, Zeyun JIANG. Influence of La3+ Doping on Structure and Electrical Properties of CaBi2Nb2O9 Piezoceramics[J]. Journal of the Chinese Ceramic Society, 2021 , 49 (4) : 648 -658 . DOI: 10.14062/j.issn.0454-5648.20200827
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Year 2021 volume 49 Issue 4
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Article Info
doi: 10.14062/j.issn.0454-5648.20200827
  • Receive Date：2020-11-03
  • Online Date：2026-10-30
  • Published：2021-04-20
Article Data
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History
  • Received：2020-11-03
  • Revised：2021-01-09
Funding
Affiliations
    Jiangxi Key Laboratory of Advanced Ceramic Materials, Department of Material Science and Engineering, Jingdezhen Ceramic Institude, Jingdezhen 333001, Jiangxi, China

Corresponding:

JIANG Xiangping (1964-), male, Ph.D., Professor.. E-mail:
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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