In this work, partial protonic conductivity in mixed conducting (BZCY721) and BaGd_0.3La_0.7Co₂O_6−δ (BGLC137) was studied. For this purpose, a modified DC Hebb–Wagner polarization method was used. A four-wire type of galvanic cell as well as a suitable calculation model was applied. The method was validated using proton conducting electrolyte – BaZr_0.7Ce_0.2Y_0.1O_3−δ – as a reference material. For the first time, protonic partial conductivity in BaGd_0.3La_0.7Co₂O_6−δ was determined. It was found that at 600 °C its total conductivity was ∼550 S cm⁻¹, whereas the partial protonic conductivity under the same conditions was 4.4 × 10⁻⁵ S cm⁻¹ (protonic transference number of 7.6 × 10⁻⁸). Therefore, the proposed measurement cell and the applied model allowed for the determination of a minor protonic conductivity in the BGLC137 electronic conductor.

中文翻译：

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一种改进的 DC Hebb-Wagner 极化方法，用于确定混合导电 BaGd0.3La0.7Co2O6−δ 中的部分质子电导率

在这项工作中，研究了混合导电（BZCY721）和BaGd _0.3 La _0.7 Co ₂ O _{6− δ} （BGLC137）中的部分质子电导率。为此，使用了改进的 DC Hebb-Wagner 偏振方法。采用四线式原电池以及合适的计算模型。使用质子传导电解质 BaZr _0.7 Ce _0.2 Y _0.1 O _{3− δ}作为参考材料对该方法进行了验证。首次测定了BaGd _0.3 La _0.7 Co ₂ O _{6− δ}中的质子部分电导率。结果发现，在600 ℃时，其总电导率为∼550 S cm ^-1，而相同条件下的部分质子电导率为4.4 × 10 ^-5 S cm ^-1（质子迁移数为7.6 × 10 ^-8）。因此，所提出的测量单元和应用的模型可以确定 BGLC137 电子导体中的较小质子电导率。