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首页> 外文期刊>International Journal of Electrochemical Science >Particle Size Refinement of Zn Electrodeposits in Alkaline Zincate Solutions with Poly (ethylene glycol ) (12) Tridecyl Ether. Part II
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Particle Size Refinement of Zn Electrodeposits in Alkaline Zincate Solutions with Poly (ethylene glycol ) (12) Tridecyl Ether. Part II

机译：用聚（乙二醇）（12）三烷基醚碱性锌酸盐溶液中Zn电沉积粒度细化。第二部分

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摘要

Electrowinning of zinc from alkaline solutions is a promising technology which can directly produce metallic zinc powder from the treatment of zinc-containing ores and wastes. Fine zinc powder is of great interest in a variety of industries, such as paints, battery electrodes and cementation. This study investigated the effect of Poly (ethylene glycol) (12) tridecyl ether (PTE) on the dendritic growth and the particle size distribution of Zn electrodeposits in alkaline solutions that have similar content as used in industry. The dendritic growth of Zn electrodeposits was studied using current-time technique and scanning electron microscopy (SEM) while the purity was analyzed by energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). The particle size distribution was investigated by sieve analysis, laser particle size analyzer and cathodic potentiodynamic polarization, respectively. The results suggest that the presence of PTE can effectively inhibit the dendritic growth of Zn electrodeposits, where small, flat and layer-less dendrites with high Zn purity (99.34 wt.%) were electrodeposited. The data from the sieve analysis shows that 77.16 wt.% of electrodeposits can pass the sieve up to 150 μm in size after the addition of PTE. This was significantly higher than from the additive-free electrolyte (19.21 wt.%). The cathodic polarization curves suggest that, after the addition of PTE, more negative overpotential of Zn electrodeposition was observed, which increased the nucleation rate of Zn nuclei and more fine zinc particles were produced. These results indicate that PTE is an effective additive for the particle size refinement of Zn electrodeposits in alkaline zincate solutions.
机译：来自碱性溶液的锌的电解是一种有前途的技术，可以直接生产含锌矿石和废物的金属锌粉。精细锌粉对各种行业的兴趣非常吻，如涂料，电池电极和胶结。该研究研究了聚（乙二醇）（12）三烷基醚（PTE）对树枝状生长的影响和工业中使用相似含量的碱性溶液中Zn电沉积的粒度分布。使用电流 - 时间技术和扫描电子显微镜（SEM）研究Zn电沉积的树突生长，而通过能量分散X射线光谱（EDS）和X射线衍射（XRD）分析纯度。通过筛分分析，激光粒度分析仪和阴极电位动力学极化研究了粒度分布。结果表明，PTE的存在可以有效地抑制Zn电沉积物的树突生长，其中电沉积在具有高Zn纯度（99.34重量％）的小，平坦和较小的树枝状芽孢菌。来自筛分分析的数据显示，77.16重量％。在添加PTE后，电沉积物的尺寸可以将筛子的尺寸传递至150μm。这显着高于无添加剂电解质（19.21重量％）。阴极偏振曲线表明，在添加PTE后，观察到Zn电沉积的更负面过电位，这增加了Zn核的成核率，并产生了更精细的锌颗粒。这些结果表明，PTE是碱性锌酸盐溶液中Zn电沉积粒度细化的有效添加剂。

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