Aurivillius single-phase Na_0.5Bi₄La_0.5Ti₄O₁₅ ceramics was prepared via solid state mixed oxide sintering technique. The ac data in terms of dielectric and impedance were collected to investigate the electrical properties and dielectric relaxation behaviors in the ceramics. The detailed frequency spectrum analysis demonstrates the existence of single dielectric relaxation behavior in the material, which is due to the grains contribution. A phase transition was observed to take place at ~570 °C. Ar-annealing study showed that above ∼280 °C, relaxation and conduction of the ceramics was assigned to the motion of ionized oxygen vacancies. The kinetic analysis was performed to probe the conduction-relaxation mechanisms in the ceramics. The present results could be significant for deep understanding of electrical properties and defect-relaxation behaviors in Na_0.5Bi₄La_0.5Ti₄O₁₅ related ceramics.

Aurivillius单相Na _0.5 Bi ₄ La _0.5 Ti ₄ O ₁₅通过固态混合氧化物烧结技术制备陶瓷。收集有关介电和阻抗的交流数据，以研究陶瓷中的电性能和介电弛豫行为。详细的频谱分析表明，材料中存在单介电弛豫行为，这是由于晶粒的贡献所致。观察到在〜570°C发生了相变。氩气退火研究表明，在〜280°C以上，陶瓷的弛豫和传导与电离氧空位的运动有关。进行了动力学分析，以探究陶瓷中的导电松弛机理。本研究结果对于深入了解Na _0.5中的电学性质和缺陷松弛行为可能具有重要意义。Bi ₄ La _0.5 Ti ₄ O ₁₅相关陶瓷。