Effects of CaTiO3, BaTiO3, and BaZrO3 on the crystal structures and electrical properties of Bi1/2Na1/2TiO3–SrTiO3 piezoelectric ceramics

IF 1.7 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

Journal of Electroceramics Pub Date : 2023-08-12 DOI:10.1007/s10832-023-00326-w

Aisyah Devita Mukhlishah, Thi Hinh Dinh, Hyoung-Su Han, Vu Diem Ngoc Tran, Vinh Van Le, Trang An Duong, Jae-Shin Lee

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Abstract

This study investigated the effects of CaTiO₃, BaTiO₃, and BaZrO₃ doping on the phase transition and strain properties of lead-free 0.76Bi_1/2Na_1/2TiO₃-0.24SrTiO₃ (BNT-24ST) piezoceramics. The nonergodicity of the BNT-24ST ceramic was stabilized as a function of CaTiO₃ doping, corresponding to the existence of the ferroelectric-to-relaxor phase transition temperature (T_F-R) peak in the dielectric permittivity curves of the samples. However, the BaTiO₃- or BaZrO₃- doped NBT-24ST samples promote the transition from a nonergodic to an ergodic relaxor phase. The 0.01 mol BaTiO₃ or 0.01 mol BaZrO₃ doping decreases the T_F-R peak of the NBT-24ST sample to below room temperature. Interestingly, it is noted that the nonergodic-to-ergodic relaxor phase transition of the BaTiO₃-doped BNT-24ST ceramics was faster than that of the BaZrO₃-doped BNT-24ST ceramics. The 0.01 mol BaTiO₃-doped BNT-24ST sample presents a maximum dielectric constant of ~ 8000. The maximum piezoelectric actuator coefficient (uni-S_max/E_max) of ~ 525 pm/V was observed for the 0.01 mol BaTiO₃-doped BNT-24ST ceramic. The effect of the tolerance factor on the phase transition and electrical properties of the BNT-24ST-ABO₃ ceramics is suggested.

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CaTiO3、BaTiO3和BaZrO3对Bi1/2Na1/2TiO3–SrTiO3压电陶瓷晶体结构和电学性能的影响

本研究探讨了掺杂 CaTiO3、BaTiO3 和 BaZrO3 对无铅 0.76Bi1/2Na1/2TiO3-0.24SrTiO3 (BNT-24ST) 压电陶瓷的相变和应变特性的影响。随着 CaTiO3 掺杂量的增加，BNT-24ST 陶瓷的非极性趋于稳定，这与样品介电常数曲线中存在铁电到松弛相变温度（TF-R）峰相对应。然而，掺杂 BaTiO3 或 BaZrO3 的 NBT-24ST 样品促进了从非极性到极性弛豫相的转变。0.01 摩尔 BaTiO3 或 0.01 摩尔 BaZrO3 掺杂会使 NBT-24ST 样品的 TF-R 峰值降低到室温以下。有趣的是，掺杂 BaTiO3 的 BNT-24ST 陶瓷的非极性到极性弛豫相转变比掺杂 BaZrO3 的 BNT-24ST 陶瓷更快。掺杂 0.01 mol BaTiO3 的 BNT-24ST 样品的最大介电常数约为 8000。掺杂 0.01 mol BaTiO3 的 BNT-24ST 陶瓷的最大压电致动器系数（uni-Smax/Emax）约为 525 pm/V。本文提出了公差因子对 BNT-24ST-ABO3 陶瓷的相变和电性能的影响。

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来源期刊

Journal of Electroceramics 工程技术-材料科学：硅酸盐

CiteScore

2.80

自引率

5.90%

发文量

审稿时长

5.7 months

期刊介绍： While ceramics have traditionally been admired for their mechanical, chemical and thermal stability, their unique electrical, optical and magnetic properties have become of increasing importance in many key technologies including communications, energy conversion and storage, electronics and automation. Electroceramics benefit greatly from their versatility in properties including: -insulating to metallic and fast ion conductivity -piezo-, ferro-, and pyro-electricity -electro- and nonlinear optical properties -feromagnetism. When combined with thermal, mechanical, and chemical stability, these properties often render them the materials of choice. The Journal of Electroceramics is dedicated to providing a forum of discussion cutting across issues in electrical, optical, and magnetic ceramics. Driven by the need for miniaturization, cost, and enhanced functionality, the field of electroceramics is growing rapidly in many new directions. The Journal encourages discussions of resultant trends concerning silicon-electroceramic integration, nanotechnology, ceramic-polymer composites, grain boundary and defect engineering, etc.