文献类型：期刊文献

英文题名：Mitigation of Thermal Instability for Electrical Properties in CaZrO3-Modified (Na, K, Li) NbO3 Lead-Free Piezoceramics

作者：Chen, Xiaoming Ai, Caoyuan Yang, Zhenghuai Ni, Yuanxian Yin, Xiaodong You, Jiankui Li, Guorong

第一作者：Chen, Xiaoming

通信作者：Chen, XM[1];Chen, XM[2]

机构：[1]Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Mat & Energy Engn, Guiyang 550003, Peoples R China;corresponding author), Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China.|贵州理工学院;

年份：2023

卷号：16

期号：10

外文期刊名：MATERIALS

收录：;EI(收录号：20232214168054);Scopus(收录号：2-s2.0-85160444200);WOS:【SCI-EXPANDED(收录号:WOS:000997867200001)】；

基金：The work was funded by the National Natural Science Foundation of China (Grant No. 52162015), Science and the Opening Project of Key Laboratory of Inorganic Functional Materials and Devices, Chinese Academy of Sciences (Grant No. KLIFMD202201), Technology Fund of Guizhou Province, China (Grant No. [2020]1Y204) and Fund of Guizhou Institute of Technology, China (Grant No. XJGC20190920; GZLGXM-21).

语种：英文

外文关键词：piezoelectric ceramics; phase transition; thermal instability

摘要：Lead-free ceramics 0.96(Na0.52K0.48)(0.95)Li0.05NbO3-0.04CaZrO(3) (NKLN-CZ) are prepared by using the solid-state procedure and two-step synthesis technique. The crystal structure and thermal stability of NKLN-CZ ceramics sintered at 1140-1180 degrees C are investigated. All the NKLN-CZ ceramics are ABO(3)-type perovskite phases without impure phases. With the increase in sintering temperature, a phase transition occurs in NKLN-CZ ceramics from the orthorhombic (O) phase to the concomitance of O-tetragonal (T) phases. Meanwhile, ceramics become dense because of the presence of liquid phases. In the vicinity of ambient temperature, an O-T phase boundary is obtained above 1160 degrees C, which triggers the improvement of electrical properties for the samples. The NKLN-CZ ceramics sintered at 1180 ffi C exhibit optimum electrical performances (d(33) = 180 pC/N, k(p) = 0.31, dS/dE = 299 pm/V, # r = 920.03, tan delta = 0.0452, Pr = 18 mu C/cm(2), Tc = 384 degrees C, E-c = 14 kV/cm). The relaxor behavior of NKLN-CZ ceramics was induced by the introduction of CaZrO3, which may lead to A-site cation disorder and show diffuse phase transition characteristics. Hence, it broadens the temperature range of phase transformation and mitigates thermal instability for piezoelectric properties in NKLN-CZ ceramics. The value of kp for NKLN-CZ ceramics is held at 27.7-31% (variance of kp < 9%) in the range from 25 to 125 degrees C. The results indicate that lead-free ceramics NKLN-CZ is one of the hopeful temperature-stable piezoceramics for practical application in electronic devices.