In this work we use Impedance Spectroscopy (IS) to study lead-free ceramics of perovskite structure (Bi1/2Na1/2TiO3)0.925(BaTiO3)0.075 with Mn doping of 0, 0.2, 1.0, and 2.0 atomic%. We compare our IS results with permittivity results, using dielectric to resistivity transformation equations which allow us to display results either as permittivity or as resistivity. We observe ionic conductivity dominating at lower temperatures, giving way to electronic conductivity at higher temperatures. The permittivity shows deviations from Curie-Weiss behavior characteristic of relaxor ferroelectrics. The 0.2% Mn samples show the highest ionic resistivity, which will reduce heating for high voltage piezoelectric applications. They also have the highest Curie-Weiss temperature and Burns temperature.

中文翻译：

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钛酸铋钠的阻抗谱 - 掺杂锰的钛酸钡陶瓷

在这项工作中，我们使用阻抗谱 (IS) 研究钙钛矿结构 (Bi1/2Na1/2TiO3)0.925(BaTiO3)0.075 的无铅陶瓷，Mn 掺杂量为 0、0.2、1.0 和 2.0 原子％。我们将 IS 结果与介电常数结果进行比较，使用介电常数到电阻率转换方程，这使我们能够将结果显示为介电常数或电阻率。我们观察到离子电导率在较低温度下占主导地位，在较高温度下让位于电子电导率。介电常数显示了与弛豫铁电体的居里-魏斯行为特征的偏差。0.2% Mn 样品显示出最高的离子电阻率，这将减少高压压电应用的发热。它们还具有最高的居里-魏斯温度和伯恩斯温度。