The effect of ultrasound on the production of cobalt powder was analysed. The experiments were carried out with a standardised hydrocyclone, whose internal cylindrical stainless-steel wall acted as a cathode and the vortex finder as an anode, made of Pb-0.75%Ag alloy. The electrolyte was a synthetic solution containing 1.9–3.8 g dm⁻³ Co in 36.7 g dm⁻³ (NH₄)₂SO₄ and 30 g dm⁻³ H₃BO₃ at pH 5.5 as the supporting electrolyte. Ultrasound application was very effective to detach the dendritic deposits from the cathode surface and also to improve the reactor performance in comparison with a silent system. The best working conditions were achieved at a current of 15 A and 60 °C, where the partial current of hydrogen evolution is acceptably low. Under these conditions, the current efficiency was 58.3%, 11.7 kW h kg⁻¹ the specific energy consumption, 63.7 kg m⁻³ h⁻¹ the space time yield and 61% the cobalt fraction obtained from the spigot. The volumetric kinetic constants under ultrasound or silent conditions were calculated from the experimental data, corroborating the beneficial effect of ultrasound for the production of cobalt powder. The particles have a globular shape with a dendritic characteristic featuring an average length of 31.7 μm.

分析了超声波对钴粉生产的影响。实验使用标准化的水力旋流器进行，其内部圆柱形不锈钢壁作为阴极，涡流探测器作为阳极，由 Pb-0.75%Ag 合金制成。电解质是一种合成溶液，在 36.7 g dm ^-3 (NH ₄ ) ₂ SO ₄和 30 g dm ^-3 H ₃ BO _{3 中}含有 1.9-3.8 g dm ^-3 Co在 pH 5.5 作为支持电解质。与无声系统相比，超声应用非常有效地将树枝状沉积物从阴极表面分离，并且还提高了反应器性能。最佳工作条件是在 15 A 和 60 °C 的电流下实现的，其中析氢的部分电流很低。在这些条件下，电流效率为58.3%，11.7 kW h kg ^{-1 单位}能耗，63.7 kg m ^-3 h ^-1时空产率和 61% 从套管中获得的钴分数。根据实验数据计算了超声或静默条件下的体积动力学常数，证实了超声对钴粉生产的有益作用。颗粒呈球形，具有树枝状特征，平均长度为 31.7 μm。