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首页> 外文会议>China International Conference on High-Performance Ceramics >Synthesis and Impedance Spectroscopy of Ga-doped La_(9.33)(SiO_4)_6O_2 Apatite Oxide Ion Conductor
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Synthesis and Impedance Spectroscopy of Ga-doped La_(9.33)(SiO_4)_6O_2 Apatite Oxide Ion Conductor

机译：Ga-掺杂La_（9.33）（SiO_4）_6O_2磷灰石氧化物离子导体的合成和阻抗光谱

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Apatite materials are interesting alternative solid oxide fuel cell (SOFC) electrolytes because of their open structure including tunnels for the diffusion of oxide ions and their good chemical stability. However, the conductivity was still relative low when it was used as SOFC in the intermediate operating temperature range. So the apatite-type lanthanum silicates/germanates and doping were widely researched for enhancing conductivity recently. This study reports the influence of Ga doping on conductivity of the apatite phase La_(9.33)(SiO_4)_6O_2 according to the formula La_(9.33-x/3)(SiO_4)_(6-x)(GaO_4)_xO_2 where 0 <= x <= 2. Samples were prepared by a sol-gel process. The conductivities of all compositions have been obtained by-impedance spectroscopy analysis. The conductivity enhancement observed for moderate x values and illustrates further influenced by the tetrahedral cation sublattice and the La vacancies in optimizing the conductivity.
机译：磷灰石材料是有趣的替代固体氧化物燃料电池（SOFC）电解质，因为它们的开放结构包括用于扩散氧化物离子的隧道及其良好的化学稳定性。然而，当在中间工作温度范围内用作SOFC时，电导率仍然相对较低。因此，磷灰石型镧硅酸盐/锗酯和掺杂被广泛研究了最近提高电导率。本研究报告了Ga掺杂对磷灰石相La_（9.33）（SiO_4）_6O_2的电导率的影响，根据式LA_（9.33-x / 3）（SiO_4）_（6-x）（gao_4）_xO_2，其中0 < = x <= 2.样品通过溶胶 - 凝胶法制制备。所有组合物的导电性已经通过阻抗光谱分析获得。对于中等X值观察到的电导率增强，并说明了通过四面体阳离子子分离的进一步影响，并且在优化导电性时的空位。

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