Self-assembled porous tantalum oxide prepared in H2SO4/HF electrolytes
Sieber, I., Kannan, B., and Schmuki, P. (2005) Self-assembled porous tantalum oxide prepared in H2SO4/HF electrolytes. Electrochemical and Solid-State Letters, 8 (3). pp. 10-12.
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The formation of porous Ta2O5 on tantalum was investigated in H2SO4 electrolytes containing low concentrations of HF (0.15 wt %). Under optimized electrochemical conditions, porous Ta2O5 consisting of self-assembled pore arrays with single pore diameters of ~20 nm and a pore spacing of ~15 nm forms. The pore structure and the pore distribution depend on the concentration of HF, the anodization voltage, and the time for anodic oxidation. Porous layers ~400 nm thick with a regular pore distribution can be formed. For thicker layers cracking and a tendency for delamination was observed.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||tantalum compounds; hydrogen compounds; nanoporous materials; self-assembly; electrolytes; anodisation; anodised layers; delamination|
|Date Deposited:||10 Apr 2010 01:09|
|FoR Codes:||09 ENGINEERING > 0912 Materials Engineering > 091207 Metals and Alloy Materials @ 100%|
|SEO Codes:||86 MANUFACTURING > 8611 Basic Metal Products (incl. Smelting, Rolling, Drawing and Extruding) > 861199 Basic Metal Products (incl. Smelting, Rolling, Drawing and Extruding) not elsewhere classified @ 100%|
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