Abstract

The dielectric constant (ε'), loss factor (tanδ), and ac conductivity (σ_ac) of 30 Li₂O–10CdO–(60 – x)-B₂O₃:xLn₂O₃, where (x = 0 and 1) and (Ln = Pr, Nd, Sm, and Eu) were investigated using a frequency range of 10²–10⁵ Hz and temperature ranging from 30 to 250°C in this work. The differential scanning calorimetry (DSC) technique was employed to confirm the glassy nature of the materials under study. The dielectric parameters ε', tan δ, and σ_ac rise when rare-earth ions are added to the glass matrix at any frequency or temperature. Dielectric breakdown and activation energies are lower in doped than in undoped glasses while ac current flows through them at room temperature. Rare-earth ion doping’s dielectric parameter values decrease with temperature as atomic number (Z) rises. The dielectric parameter values for the Pr³⁺ doped glass matrix is the highest. QM tunnelling model was used to describe the ac conduction behaviour of these glasses.

中文翻译：

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稀土离子掺杂对硼酸锂镉玻璃交流电导率和介电性能的影响

摘要

30 Li ₂ O–10CdO–(60 – x )-B ₂ O ₃ : x Ln ₂ O ₃的介电常数 (ε')、损耗因数 (tanδ) 和交流电导率 (σ _ac ) ，其中 ( x = 0 和 1) 和 (Ln = Pr、Nd、Sm 和 Eu) 在这项工作中使用 10 ² –10 ⁵ Hz的频率范围和 30 至 250°C 的温度进行了研究。采用差示扫描量热法（DSC）技术来确认所研究材料的玻璃态性质。当稀土离子在任何频率或温度下添加到玻璃基体中时，介电参数 ε'、tanδ 和 σ _{ac都会上升。}当交流电流在室温下流过时，掺杂玻璃的介电击穿和活化能低于未掺杂玻璃。稀土离子掺杂的介电参数值随着原子序数（Z）的升高而降低。Pr ³⁺掺杂玻璃基体的介电参数值最高。QM 隧道模型用于描述这些玻璃的交流传导行为。