Abstract In this study, Na0.5Bi0.5TiO3-xSrTiO3 (NBT-xST, x = 0, 0.10, 0.26) whiskers were synthesized by a two step molten salt method using Na2Ti6O13 whiskers as templates. The crystalline phase, morphology, microstructure, composition and ferroelectric characteristic of the whiskers were investigated in details. The topochemical transformation from Na2Ti6O13 structure to NBT-xST perovskite structure was found to occur by structural rearrangement of the edge sharing octahedra into vertex sharing octahedra. The prepared polycrystalline NBT-xST whiskers possessed high aspect ratio with diameter of 500–800 nm and length of 5–10 µm. The PFM investigations confirmed the favorable piezoelectricity of NBT whiskers while the NBT-0.26ST whiskers displayed relaxor-ferroelectric characteristics at room temperature, exhibiting the potential of NBT-xST whiskers for fabricating high performance micro/nano-devices.

中文翻译：

---

无铅 (1-x)Na 0.5 Bi 0.5 TiO 3 -xSrTiO 3 (x=0, 0.10, 0.26) 晶须的熔盐合成及表征

摘要 本研究以 Na2Ti6O13 晶须为模板，通过两步熔盐法合成了 Na0.5Bi0.5TiO3-xSrTiO3 (NBT-xST, x = 0, 0.10, 0.26) 晶须。详细研究了晶须的晶相、形貌、微观结构、成分和铁电特性。发现从 Na2Ti6O13 结构到 NBT-xST 钙钛矿结构的拓扑化学转变是通过共享八面体的边缘结构重排为顶点共享八面体而发生的。制备的多晶 NBT-xST 晶须具有高纵横比，直径为 500-800 nm，长度为 5-10 µm。PFM 研究证实了 NBT 晶须的良好压电性，而 NBT-0.26ST 晶须在室温下表现出弛豫 - 铁电特性，