Effect of electrolyte temperature on the formation of self-organized anodic niobium oxide microcones in hot phosphate–glycerol electrolyte
Effect of electrolyte temperature on the formation of self-organized anodic niobium oxide microcones in hot phosphate–glycerol electrolyte
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DOI：
10.1016/j.apsusc.2011.01.041
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发表时间：
2011-07
影响因子：
6.7
通讯作者：
S. Yang;Y. Aoki;H. Habazaki
中科院分区：
文献类型：
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作者：
S. Yang;Y. Aoki;H. Habazaki
在含有0.6moldm−3k2hpo4和0.2moldm−3k3po4的甘油电解质中，在428 ~ 453k的温度范围内，在10V下阳极氧化，形成了表面形貌为微锥型的纳米孔氧化铌膜。延长阳极氧化时间后出现微锥体，但提高电解液温度可大大缩短所需时间。阳极氧化物最初在所有温度下都是无定形的，但在阳极氧化过程中结晶氧化物成核。由于初始形成的非晶态氧化物优先被化学溶解，表面出现了结晶性的阳极氧化微锥。提高电解液温度可加速初始形成的非晶层的化学溶解，温度对微锥形貌的影响可忽略不计，直至448K。
Nanoporous niobium oxide films with microcone-type surface morphology were formed by anodizing at 10V in glycerol electrolyte containing 0.6moldm−3K2HPO4and 0.2moldm−3K3PO4in a temperature range of 428–453K. The microcones appeared after prolonged anodizing, but the required time was largely reduced by increasing electrolyte temperature. The anodic oxide was initially amorphous at all temperatures, but crystalline oxide nucleated during anodizing. The anodic oxide microcones, which were crystalline, appeared on surface as a consequence of preferential chemical dissolution of initially formed amorphous oxide. The chemical dissolution of an initially formed amorphous layer was accelerated by increasing the electrolyte temperature, with negligible influence of the temperature on the morphology of microcones up to 448K.