Zhengzhou Railway Vocational and Technical College, Zhengzhou, Henan, PR China.
PLoS One. 2023 Aug 31;18(8):e0286765. doi: 10.1371/journal.pone.0286765. eCollection 2023.
Transparent conductive thin films (TCO) are widely used for their excellent photoelectric properties. To prepare high-quality ZnO targets, starting with the original ZnO powder is necessary. This paper aims to explore the basic technology and method of ultrasonic-assisted direct precipitation for mass production of ZnO powder and to analyze the effects of factors such as precipitating agent, surfactant, calcination temperature, and solvent on the powder's morphology, particle size, and crystallinity. The study found that the type and amount of precipitants and surfactants affect the powder's morphology and dispersibility, while calcination temperature mainly affects the powder's morphology and crystallinity. The ethanol content in the solvent mainly affects the grain size. After testing different variables, the optimal conditions for preparing spherical ZnO powder were found to be using (NH4)2·CO3 as the precipitant, adding 3% wt of PEG-400 and 3% wt of TEA at a calcination temperature of 320°C and a 60% ethanol solvent. This resulted in a smooth surface, uniform particle size distribution, good dispersibility, high crystallinity, and particle sizes between 26-32nm.
透明导电薄膜（TCO）因其优异的光电性能而被广泛应用。为了制备高质量的 ZnO 靶材，有必要从原始的 ZnO 粉末开始。本文旨在探索超声辅助直接沉淀法批量生产 ZnO 粉末的基本技术和方法，并分析沉淀剂、表面活性剂、煅烧温度和溶剂等因素对粉末形貌、粒径和结晶度的影响。研究发现，沉淀剂和表面活性剂的类型和用量影响粉末的形貌和分散性，而煅烧温度主要影响粉末的形貌和结晶度。溶剂中乙醇的含量主要影响晶粒尺寸。在测试不同变量后，发现制备球形 ZnO 粉末的最佳条件为使用（NH4）2·CO3作为沉淀剂，在煅烧温度为 320°C 和 60%乙醇溶剂下添加 3%wt 的 PEG-400 和 3%wt 的 TEA。这导致表面光滑、粒径分布均匀、分散性好、结晶度高、粒径在 26-32nm 之间。
