Abstract A novel Dy-Ho co-doped face centered cubic (FCC) phase stabilized bismuth oxide solid electrolyte has been developed using low temperature auto – ignition method. XRD analysis confirms that complete phase stabilization has been achieved for all co-doped systems. The decrease in lattice parameter for doped system has been attributed to lower ionic radii of dopants Dy3+ and Ho3+ in comparison with Bi3+. Crystallite size has been found to be maximum and microstrain is minimum for the composition Bi0.88Dy0.06Ho0.06O1.5−δ having equal proportion of dopant content. The same composition shows higher ionic conductivity at lower temperature regime. The electrical modulus study using Havriliak–Negami (HN) formalism indicates non – Debye type relaxation behavior. Comparable values of different types of activation energies indicate that relaxation, hoping mechanism, dc and ac conduction process follow the same kind of transport mechanism. The scaling of the conductivity and modulus spectra verifies the time–temperature superposition principle (TTSP).

中文翻译：

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对 Dy-Ho 共掺杂相稳定氧化铋基电解质电性能的结构洞察

摘要 采用低温自燃法开发了一种新型的 Dy-Ho 共掺杂面心立方 (FCC) 相稳定的氧化铋固体电解质。XRD 分析证实所有共掺杂系统都实现了完全的相稳定。掺杂系统晶格参数的降低归因于掺杂剂 Dy3+ 和 Ho3+ 的离子半径比 Bi3+ 低。已发现对于具有相等比例的掺杂剂含量的组合物 Bi0.88Dy0.06Ho0.06O1.5-δ 而言，微晶尺寸最大且微应变最小。相同的组成在较低的温度范围内显示出较高的离子电导率。使用 Havriliak-Negami (HN) 形式主义的电模量研究表明非德拜型弛豫行为。不同类型活化能的可比值表明松弛、希望机制，直流和交流传导过程遵循相同的传输机制。电导率和模量谱的缩放验证了时间-温度叠加原理（TTSP）。