Abstract (Bi0.5Na0.5)TiO3 (BNT)-based piezoceramics usually exhibit enhanced piezoelectric coefficient d33 together with the deterioration of depolarization temperature Td, which is the common drawback limiting their use in practical application. Here, we demonstrate that harnessing the microstructure in BNT-based ceramics will be an efficient way to resolve this obstacle. oriented piezoelectric ceramics 0.94(Bi0.5Na0.5)TiO3 −0.06BaTiO3 was engineered by templated grain growth (TGG) using NaNbO3 (NN) as templates. The manufactured textured ceramics with the optimized microstructure was characterized by not only approximately 200% enhancement in the magnitude of piezoelectric response (d33~297pC/N) but also improved thermal stability (Td~57 °C) in comparison to its randomly oriented counterparts (d33~151pC/N and Td~32 °C). Moreover, the enhanced piezoelectricity in grain oriented specimens primarily originated from a high degree of non-180° domain switching as compared to the randomly axed ones. The current study opens the door to pair high piezoelectric properties and enhanced thermal stability in BNT-related materials though texture technique.

中文翻译：

---

在晶粒取向的 BNT 基无铅压电陶瓷中配对高压特性和增强的热稳定性

摘要 (Bi0.5Na0.5)TiO3 (BNT)基压电陶瓷通常表现出增强的压电系数d33以及去极化温度Td的恶化，这是限制其在实际应用中使用的共同缺点。在这里，我们证明利用 BNT 基陶瓷中的微观结构将是解决这一障碍的有效方法。取向压电陶瓷 0.94(Bi0.5Na0.5)TiO3 -0.06BaTiO3 是使用 NaNbO3 (NN) 作为模板通过模板化晶粒生长 (TGG) 设计的。与随机取向的陶瓷相比，制造的具有优化微观结构的纹理陶瓷不仅压电响应幅度（d33~297pC/N）提高了约 200%，而且热稳定性（Td~57°C）也有所提高。 d33~151pC/N 和 Td~32°C)。而且，与随机轴相比，晶粒取向试样中增强的压电性主要源于高度的非 180° 畴切换。目前的研究为通过纹理技术在 BNT 相关材料中配对高压压电特性和增强的热稳定性打开了大门。