Abstract

Arsenate phosphates NaZr₂(AsO₄)_x(PO₄)_{3 –x} are synthesized by the sol–gel method with subsequent annealing at 1123 K. Thus obtained specimens are investigated using X-ray diffraction analysis, IR and impedance spectroscopy. In the NaZr₂(AsO₄)_x(PO₄)_{3 –x} system, continuous solid solution (0 ≤ x ≤ 3) with NaZr₂(PO₄)₃ (NASICON) structure forms. According to the impedance spectroscopy data, an increase of the content of arsenic in the NaZr₂(AsO₄)_x(PO₄)_{3 –x} system leads to an increase of the sodium-ionic conductivity; for NaZr₂(AsO₄)₃, it reaches 8 × 10^–5 S/cm at 773 K. At the same time, the activation energy of conductivity of this material (50 ± 1 kJ/mol) appears to be twice lower than the activation energy of conductivity of NaZr₂(PO₄)₃ (100 ± 1 kJ/mol).

中文翻译：

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NaZr 2（AsO 4）x（PO 4）3 – x的合成及离子电导率

抽象的

通过溶胶-凝胶法合成磷酸砷化钠NaZr ₂（AsO ₄）_x（PO ₄）_{3- x}，随后在1123 K下进行退火。因此，使用X射线衍射分析，IR和阻抗谱研究了所得标本。在纳兹尔₂（ASO ₄）_X（PO ₄）_{3 - X}系统，连续固溶体（0≤ X ≤3）与纳兹尔₂（PO ₄）₃（NASICON）结构的形式。根据阻抗谱数据，NaZr ₂中砷的含量增加（AsO ₄）_x（PO ₄）_{3- x}体系导致钠离子电导率增加；对于NaZr ₂（AsO ₄）₃，在773 K时达到8×10 ^–5 S / cm。与此同时，该材料的电导率活化能（50±1 kJ / mol）似乎比其低两倍。 NaZr ₂（PO ₄）₃的电导率活化能（100±1 kJ / mol）。