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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Electrical conductivity and dielectric properties of rare earth ions (Ce3+, Pr3+ and Eu3+) doped in zinc sodium phosphate glass
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Electrical conductivity and dielectric properties of rare earth ions (Ce3+, Pr3+ and Eu3+) doped in zinc sodium phosphate glass

机译：稀土离子（Ce3 +，Pr3 +和Eu3 +）的电导率和介电性能掺杂磷酸锌玻璃钠

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摘要

The zinc phosphate glass (composition Na2-3xMxZnP2O7) doped with different rare earth ions (x =1 mol% where M = Ce, Pr and Eu), were synthesized by the classical melting and quenching processes. Electrical and dielectric properties including dielectric constant epsilon ' (omega), loss tangent tan delta, as well as electric conductivity sigma ac, have been investigated over a wide continuous frequency range from 10-2 Hz to 106 Hz over a temperature range 283 K to 473 K using complex impedance spectroscopy (CIS). The results revealed that the conductivity decreases and activation energy increases with the ionic radii of cations (from Eu3+to Ce3+) likely due to the size mismatch. This behaviour could be attributed to the depolymerization of the glass network by Eu3+. This induces the decrease of the electrostatic binding and strains energies facilitating the passage of sodium ions. The average value of the power law exponent s is interpreted by the correlated barrier hopping (CBH) model.
机译：采用经典熔融和淬火工艺合成了掺杂不同稀土离子（x=1 mol%，其中M=Ce、Pr和Eu）的磷酸锌玻璃（成分Na2-3xMxZnP2O7）。在283 K至473 K的温度范围内，在10-2 Hz至106 Hz的宽连续频率范围内，利用复阻抗谱（CIS）研究了电学和介电性能，包括介电常数ε（ω）、损耗角正切tanδ以及电导率σac。结果表明，随着阳离子的离子半径（从Eu3+到Ce3+）的增加，电导率降低，活化能增加，这可能是由于尺寸不匹配。这种行为可归因于玻璃网络被Eu3+解聚。这会导致静电结合和应变能的降低，从而促进钠离子的通过。幂律指数s的平均值由相关势垒跳跃（CBH）模型解释。

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