Abstract In this paper, we systematically studied the structure and properties of SrPrAlO4-modified (Bi0.5Na0.5)0.935Ba0.065TiO3 (BNT-0.065BT) lead-free piezoelectric ceramics. There is no impurity in the SrPrAlO4-modified BNT-0.065BT, and all samples form pure perovskite structure. The substitution of SrPrAlO4 induces the transformation of ferroelectric to ergodic relaxor phase. As a result, a large electric-field induced strain of 0.35% (@70 kV/cm, corresponds to a large signal piezoelectric d33* (Smax/Emax) of 500 pm/V) is obtained when the SrPrAlO4 dopant concentration is 0.012. In addition, the large strain in this material is very resistant to field cycling, rendering the material attractive for its fatigue-free behavior. Moreover, SrPrAlO4-modified ceramics exhibit orange-red emission under 450 nm photoexcitation. There is a strong red emission peak at 610 nm corresponded to the transition of 1D2 →3H4 and a weak red emission peak at 660 nm ascribed to the 3P0 →3F2 transition. The multifunctional characteristics with good electrical and luminescent properties in BNT-0.065BT-xSrPrAlO4 ceramics render the materials may have broad application prospects in new devices with multiple functions.

中文翻译：

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具有亮红色发射和大应变响应的多功能钛酸铋钠基铁电陶瓷

摘要 本文系统地研究了SrPrAlO4 改性(Bi0.5Na0.5)0.935Ba0.065TiO3 (BNT-0.065BT) 无铅压电陶瓷的结构和性能。SrPrAlO4 改性的 BNT-0.065BT 中没有杂质，所有样品均形成纯钙钛矿结构。SrPrAlO4 的取代诱导铁电体向遍历弛豫相的转变。结果，当 SrPrAlO4 掺杂浓度为 0.012 时，获得了 0.35% 的大电场诱导应变（@70 kV/cm，对应于 500 pm/V 的大信号压电 d33*（Smax/Emax））。此外，这种材料的大应变对场循环具有很强的抵抗力，因此该材料因其无疲劳行为而具有吸引力。此外，SrPrAlO4 改性陶瓷在 450 nm 光激发下呈现橙红色发射。在 610 nm 处有一个强红色发射峰，对应于 1D2 →3H4 的跃迁，在 660 nm 处有一个弱红色发射峰，归因于 3P0 →3F2 跃迁。BNT-0.065BT-xSrPrAlO4陶瓷具有良好的电学和发光性能的多功能特性，使得该材料在新型多功能器件中具有广阔的应用前景。