Abstrac

t—The (1 – x)Nd₂(WO₄)₃–xSiO₂ composites where the silicon oxide mole fraction is x ≤ 0.5 were manufactured by the solid-phase method. The phase compositions of the composites and their thermodynamic stability were verified by X-ray powder diffraction and thermogravimetry, respectively, in combination with differential scanning calorimetry (DSC). The morphology of the composites was studied by scanning electron microscopy (SEM) combined with energy-dispersive X-ray analysis. The electrical conductivity of the composites measured by electrochemical impedance was studied as functions of temperature, oxygen vapor pressure, and the amount of silicon oxide (the dispersed additive). The sums of ion transference numbers were studied as a function of temperature by the EMF method; the ionic character of conduction in the composites was found. The composite-conductivity effect was found to occur in the studied system: additions of 30 mol % nanosized silica to neodymium tungstate increased the ionic conductivity by more than two orders of magnitude.

中文翻译：

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Nd2(WO4)3-SiO2复合材料的合成及电性能

抽象

t— (1 – x )Nd ₂ (WO ₄ ) ₃ – x SiO ₂复合材料，其中氧化硅摩尔分数为x≤0.5采用固相法制造。复合材料的相组成及其热力学稳定性分别通过X射线粉末衍射和热重分析并结合差示扫描量热法（DSC）进行了验证。通过扫描电子显微镜 (SEM) 结合能量色散 X 射线分析研究了复合材料的形貌。研究了通过电化学阻抗测量的复合材料的电导率作为温度、氧蒸气压和氧化硅（分散的添加剂）量的函数。通过 EMF 方法研究了离子迁移数总和作为温度的函数；发现了复合材料中的离子传导特性。发现所研究的系统中出现了复合电导率效应：