电子元件与材料2018，Vol.37Issue(4)：44-48,5.DOI:10.14106/j.cnki.1001-2028.2018.04.008
纳米有序多孔阳极氧化铝形成过程中的对流作用
Influence of electrolyte convection in formation of ordered nanoporous anodic alumina
摘要
Abstract
Two-step anodizing process has been widely adopted in the fabrication of nanoporous porous anodic alumina (PAA) due to its wide application, simple preparation technology and low cost. However, there have been different viewpoints on the formation mechanism of PAA during the two-step anodizing process. According to the fact that electrolyte has internal orderly circulation affected by electric field and temperature difference and considering the experiment of the fabrication of PAA by two-step anodizing oxidation method and the appearance of the samples, the formation mechanism of ordered porous structure was researched. The results manifest that ordered porous anodic alumina is attributed to orderly circulation of electrolyte in the preliminary stage of PAA formation process, which is caused by the difference of conductive ion concentration under the effect electric field on the surface of compact alumina film. In the later period of anodizing, the electrolyte, as an open system away from the equilibrium state, enters an ordered dissipative structure state when the critical temperature is reached. That is, self-organized thermal convection occurs in the electrolyte, which is the dominant factor that the secondary anodizing can form large pores and highly ordered pores structure.关键词
阳极氧化铝/自组织/有序多孔结构/粒子环流/贝纳尔对流/耗散结构Key words
anodized aluminum/self-organized/ordered porous structure/particle circulation/Bénard convection/dissipative structure分类
化学化工引用本文复制引用
谢宁,塔力哈尔·夏依木拉提,汪超..纳米有序多孔阳极氧化铝形成过程中的对流作用[J].电子元件与材料,2018,37(4):44-48,5.基金项目
新疆工程学院科研基金项目(2014xgy031612) （2014xgy031612）
高层次引进人才工程资助项目(2015RST011712) （2015RST011712）
