Journal of Inorganic Materials, Volume. 37, Issue 5, 513(2022)
Zr and Ca co-doped brium titanate (BCTZ) based ceramics have attracted much attention due to their excellent dielectric and piezoelectric properties, which are potential candidates for lead-free piezoelectric materials. However, the piezoelectric property of BCTZ-based ceramics are still lower than that of commercial lead-based ceramics. Therefore, Sn elements are doped in (Ba0.85Ca0.15)(Ti0.9Zr0.1-xSnx)O3 (x = 0.02-0.07) ceramics to improve their piezoelectric property in this work. First, all ceramics exhibit a pure perovskite structure without any secondary phase. Furthermore, orthorhombic and tetragonal phases coexist at room temperature for all counterparts. Second, all ceramics display a dense microstructure. And the grain size gradually increases with Sn content increasing. The crystal structure of x=0.04 ceramic locates in morphotropic phase boundary. Meanwhile, the x=0.04 ceramic exhibits the most dense microstructure. Hence, x=0.04 ceramic has the best piezoelectric property with d33 = 590 pC•N -1, kp = 52.2%, tanδ = 0.016, ε T33= 5372, d *33= 734 pm•V -1, and IR = 57.8 GΩ•cm. This work demonstrates that the Sn-doped BCZT based lead-free piezoelectric ceramics could be applied in transducers, electromechanical sensors and actuators.
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Xinjian WANG, Yixuan ZHU, Peng ZHANG, Wenlong YANG, Ting WANG, Yu HUAN.
Category: RESEARCH ARTICLE
Received: Jul. 2, 2021
Accepted: --
Published Online: Jan. 10, 2023
The Author Email: HUAN Yu (mse_huany@ujn.edu.cn)