材料科学
奥里维里斯
压电
居里温度
微观结构
陶瓷
压电系数
兴奋剂
烧结
电阻率和电导率
晶体结构
复合材料
电介质
退火(玻璃)
分析化学(期刊)
矿物学
光电子学
结晶学
凝聚态物理
铁电性
电气工程
化学
工程类
物理
铁磁性
色谱法
作者
Yang Liu,Youcheng Yu,Chen-yi Yin,Liang Zheng,Peng Zheng,Wangfeng Bai,Lili Li,Fei Wen,Yang Zhang
标识
DOI:10.1016/s1003-6326(21)65665-0
摘要
CaBi4Ti4O15 (CBT)-based Aurivillius high-temperature piezoceramics with different Sb–Mn co-doping amounts were synthesized via the conventional sintering technique. The influences of doping amount on the product were studied via their crystal structure, microstructure, and piezoelectric performance. It is found that an appropriate Sb–Mn co-doping amount can effectively optimize the crystal structure and decrease the oxygen vacancy concentration in CBT ceramics, leading to enhanced electrical properties. Optimized electrical performance with a high Curie temperature (TC) of 792 °C and a remarkable piezoelectric coefficient (d33) of 25 pC/N were achieved at a doping amount (x) of 0.05. Furthermore, this ceramic is found to exhibit an excellent thermal stability, with d33 retaining 88% of its original value after annealing at 600 °C for 2 h. Moreover, this ceramic shows a high electrical resistivity (ρ) of 1.35×108 Ω·cm with a small dielectric loss (tan δ) of 1.7% at 400 °C. Because of such outstanding piezoelectric performance, it is believed that these Sb–Mn co-doped CBT ceramics could be potential candidates for high-temperature piezoelectric applications.
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