Abstract Ba 1- x Pr 2 x /3 Ti 0.925 (Yb 0.5 Nb 0.5 ) 0.075 O 3 :( x PrBTYN) (0.02 ≤ x ≤ 0.08) ceramics were prepared by a high temperature solid-state reaction technique. The effects of the Pr 3+ addition to structural and dielectric properties were examined. The X-ray study has evidenced a cubic single phase in the Pm -3 m space group. Raman spectra showed that the replacement of the Ba 2+ by Pr 3+ ions induced a down shift of active modes accompanied with a significant reduction in the intensity. Further, a new mode appeared at 115 cm −1 with an intensity depended on the composition. Dielectric study as a function of temperature and frequency of ceramic samples has revealed a normal ferroelectric behavior where x ≤ 0.06, instead to a relaxor character in the case of ceramic with an optimum value of Pr 3+ doping (x = 0.08).

中文翻译：

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Pr 3+ 掺杂的BaTi 0.925 (Yb 0.5 Nb 0.5 ) 0.075 O 3 陶瓷的结构和介电性能

摘要 采用高温固相反应技术制备了Ba 1- x Pr 2 x /3 Ti 0.925 (Yb 0.5 Nb 0.5 ) 0.075 O 3 :( x PrBTYN) (0.02 ≤ x ≤ 0.08) 陶瓷。检查了Pr 3+ 添加物对结构和介电特性的影响。X 射线研究证明了 Pm -3 m 空间群中的立方单相。拉曼光谱表明，Ba 2+ 被Pr 3+ 离子替代引起活性模式的下移，伴随着强度的显着降低。此外，在 115 cm -1 处出现了一种新模式，其强度取决于成分。作为陶瓷样品的温度和频率的函数的介电研究揭示了正常的铁电行为，其中 x ≤ 0.06，而不是在具有最佳 Pr 3+ 掺杂值 (x = 0.08) 的陶瓷情况下具有弛豫特性。