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Fluorine-Ionic Conductivity of Superionic Conductor Crystals Na0.37Tb0.63F2.26

机译:外阴导体晶体Na0.37TB0.63F2.26的氟离子电导率

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摘要

The temperature dependence (in the range of 479-827 K) of the fluorine-ionic conductivity of nonstoichiometric Na0.37Tb0.63F2.26 crystals with fluorite-type structure (sp. gr. , lattice parameter a = 5.5785(1) angstrom) has been investigated. The crystals were grown from melt by the Bridgman method in a fluorinating atmosphere of CF4. The formation of cuboctahedral clusters of defects {(Na,Tb)(8)[Tb6F37]F-32} is most likely in the structure of Na0.37Tb0.63F2.26 crystals. The ionic conductivity is found to be sigma(dc) = 2.6 x 10(-6) and 3 x 10(-3) S/cm at 500 and 827 K, respectively. A crystallophysical model of ion transport in Na0.37Tb0.63F2.26 crystals is proposed. The concentration and carrier mobility are calculated to be, respectively, n(mob) = 1.45 x 10(21) cm(-3) and mu(mob) = 1.1 x 10(-8) cm(2)/(s V) at 500 K.
机译:氟离子导电性的温度依赖性(在479-827k的范围内,具有萤石型结构的氟离子电导率(SP.Gr.Gr.,格子参数A = 5.5785(1)埃) 已被调查。 通过Bridgman方法在CF4的氟化气氛中从熔体中生长晶体。 形成缺陷的副酵母簇((Na,Tb)(8)[Tb6F37] F-32}最有可能在Na0.37Tb0.63F2.26晶体的结构中。 发现离子电导率是Sigma(DC)= 2.6×10(-6)和3×10(-3)S / cm的500和827k。 提出了Na0.37TB0.63F2.26晶体离子转运的结晶模型。 计算浓度和载流子迁移率,分别是n(暴徒)= 1.45×10(21)cm(-3)和mu(mob)= 1.1×10(-8)cm(2)/(s v) 在500 K.

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  • 来源
    《Crystallography reports》 |2019年第4期|共5页
  • 作者单位

    Russian Acad Sci Fed Sci Res Ctr Crystallog &

    Photon Shubnikov Inst Crystallog Moscow 119333 Russia;

    Russian Acad Sci Fed Sci Res Ctr Crystallog &

    Photon Shubnikov Inst Crystallog Moscow 119333 Russia;

    Russian Acad Sci Fed Sci Res Ctr Crystallog &

    Photon Shubnikov Inst Crystallog Moscow 119333 Russia;

    Russian Acad Sci Fed Sci Res Ctr Crystallog &

    Photon Shubnikov Inst Crystallog Moscow 119333 Russia;

    Russian Acad Sci Fed Sci Res Ctr Crystallog &

    Photon Shubnikov Inst Crystallog Moscow 119333 Russia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 晶体学;
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