Piezoelectricity, insulation resistance and temperature stability enhanced by structural distortion in CaBi2Nb2O9-based Aurivillius ceramics

被引：0
作者：
Zhang, Biao [1 ]
Quan, Liming
Deng, Jianming [2 ]
Li, Wangxin [1 ]
Wang, Dingyuan [3 ]
Bai, Yisong [3 ]
Peng, Biaolin [4 ]
Zhang, Qi [5 ]
Chen, Xue [6 ]
Long, Changbai [7 ]
Liu, Laijun [1 ]
机构：
[1] Guilin Univ Technol, Coll Mat Sci & Engn, Collaborat Innovat Ctr Explorat Nonferrous Met Dep, Guangxi Key Lab Opt & Elect Funct Mat & Devices, Guilin 541004, Peoples R China
[2] Huizhou Univ, Guangdong Prov Key Lab Elect Funct Mat & Devices, Huizhou 516001, Guangdong, Peoples R China
[3] Qingdao Haier Smart Technol R&D Co Ltd, State Key Lab Digital Household Appliances, Qingdao 266100, Peoples R China
[4] Xidian Univ, Sch Adv Mat & Nanotechnol, Xian 710071, Peoples R China
[5] Basque Ctr Mat Applicat & Nanostruct, BCMaterials, UPV EHU Sci Pk, Leioa 48940, Spain
[6] Guilin Univ Elect Technol, Guangxi Key Lab Mfg Syst & Adv Mfg Technol, Guilin 541004, Peoples R China
[7] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 2025年 / 187卷
关键词：
Aurivillius-phase; High-temperature piezoceramics; Electrical resistivity; Thermal stability; ELECTRICAL-PROPERTIES; ELECTROMECHANICAL PROPERTIES; FERROELECTRIC PROPERTIES; DIELECTRIC-PROPERTIES; THERMAL-STABILITY; PEROVSKITE OXIDES; IMPEDANCE; CE; PIEZOCERAMICS; SPECTROSCOPY;
D O I：
10.1016/j.materresbull.2025.113370
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The impact of co-substitution of Li/Sm at A site and Sc/In/W at B site in CaBi2Nb2O9 ceramics on structure and electrical properties was investigated. The ionic substitution gives rise to a lattice distortion and an increase of tetragonality, which enhances piezoelectric response while maintaining a high Curie temperature. Oxygen vacancies are suppressed by the co-doping to improve bulk density and insulation resistance. The composition Ca0.92(Li0.5Sm0.5)0.08Bi2Nb1.95[(Sc0.5In0.5)1/3W2/3]0.05O9 [C(LS)BN-0.05SIW] ceramic exhibits a high piezoelectricity coefficient (d33) of 15 pC/N, an ultrahigh Curie temperature (TC) of 931 degrees C, and an extremely high bulk resistivity (rho b) of 1.62 x 105 Omega & sdot;cm at 700 degrees C. Meanwhile, after thermal annealing at 800 degrees C, remanent d33 is 14.3 pC/N. It suggests that the composition is a promising material for high-temperature piezoelectric applications at 600 degrees C or higher.
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页数：11
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