Formation behavior of nanoporous anodic aluminum oxide films in hot glycerol/phosphate electrolyte

Autor:	Truong N. Nguyen, Min-Woo Kim, Dae-Yeong Jeong, Doohun Kim, Jong Uk Kim
Rok vydání:	2012
Předmět:	Morphology (linguistics) Materials science Nanoporous Anodizing General Chemical Engineering chemistry.chemical_element Nanotechnology Electrolyte Nanopore chemistry Chemical engineering Aluminium Electrochemistry Porosity Current density
Zdroj:	Electrochimica Acta. 83:288-293
ISSN:	0013-4686
DOI:	10.1016/j.electacta.2012.08.019
Popis:	Formation behavior of anodic aluminum oxide (AAO) films was studied when aluminum foils were anodized in hot glycerol electrolyte containing 10 wt.% K2HPO4 in temperatures of 120–200 °C. The characteristics of the present anodization including the current density change with time, the effect of applied voltage and electrolyte temperature on anodization behavior, and the morphology and the porous structure resulting from anodization in temperatures of 120–160 °C indicated that the present anodization regime is very similar to the conventional one for formation of nanoporous AAO films near room temperatures. Two-step anodization under 50 V at 160 °C resulted in an AAO film with relatively well-ordered pore channels. Anodization at 180 °C, on the other hand, led to formation of an AAO film with a new mesosponge structure that is consisted of nanopores and nanochannels. The mechanism related to the structure transformation is not known at present.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::586a185472e57ac7b58e3187d03e033f https://doi.org/10.1016/j.electacta.2012.08.019 Zobrazit plný text záznamu Full Text from ScienceDirect