Abstract

Powder of proton-conducting BaCe_0.5Zr_0.3Y_0.1Yb_0.1O_3−δ (BCZYYbO) electrolyte is synthesized using the citrate–nitrate technique. The dispersity of the BCZYYbO suspension in a mixed medium (isopropanol/acetylacetone 70/30 vol %) is investigated. The effects of ultrasonic treatment and centrifuging on the size distribution of aggregates and the effective hydrodynamic diameter are determined. The suspension is characterized by a bimodal size distribution of aggregates. The zeta potential values are determined for the initial BCZYYbO suspension (+7 mV), a suspension with the addition of molecular iodine (0.4 g/L) (+7 mV), and suspensions of the modified initial powder (1 wt % of copper oxide BCZYYbO_CuO) (+11 mV) of the same concentration (15 g/L). It is found that adding iodine does not affect the value of the zeta potential; however it does affects the pH of the suspension. In contrast to the modified suspensions, it is impossible to conduct EPD from the initial BCZYYbO suspension. A refinement is proposed to transform the EPD mechanism from a nonaqueous suspension with the participation of iodine and the trace water content associated with the change in the concentration of H⁺ and I^– ions adsorbed on the particles in the BCZYYbO suspension.

中文翻译：

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用于 BaCe0.5Zr0.3Y0.1Yb0.1O3–δ 固体电解质电泳沉积的改性悬浮液

摘要

质子传导性 BaCe _0.5 Zr _0.3 Y _0.1 Yb _0.1 O _3−δ粉末(BCZYYbO) 电解质是使用柠檬酸盐 - 硝酸盐技术合成的。研究了 BCZYYbO 悬浮液在混合介质（异丙醇/乙酰丙酮 70/30 vol%）中的分散性。确定了超声波处理和离心对聚集体尺寸分布和有效流体动力学直径的影响。该悬浮液的特征在于聚集体的双峰尺寸分布。zeta 电位值由初始 BCZYYbO 悬浮液 (+7 mV)、添加分子碘 (0.4 g/L) (+7 mV) 的悬浮液和改性初始粉末的悬浮液（1 wt% 的铜氧化物 BCZYYbO_CuO) (+11 mV) 的相同浓度 (15 g/L)。发现加碘不影响zeta电位值；但是它确实会影响悬浮液的 pH 值。与修改后的悬浮液相比，不可能从最初的 BCZYYbO 悬浮液中进行 EPD。提出了一种改进措施，将 EPD 机制从非水悬浮液转变为碘和与 H 浓度变化相关的痕量水含量的参与⁺和 I ^–离子吸附在 BCZYYbO 悬浮液中的颗粒上。