Transport phenomena inside the pores involved in the kinetics and mechanism of growth of porous anodic Al2O3 films on aluminium

Patermarakis, G

dc.contributor.author	Patermarakis, G	en
dc.date.accessioned	2014-03-01T01:12:31Z
dc.date.available	2014-03-01T01:12:31Z
dc.date.issued	1996	en
dc.identifier.issn	0022-0728	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12111
dc.subject	Al2O3	en
dc.subject	Films	en
dc.subject	Kinetics	en
dc.subject	Porous films	en
dc.subject	Transport analysis	en
dc.subject.classification	Chemistry, Analytical	en
dc.subject.classification	Electrochemistry	en
dc.subject.other	Aluminum	en
dc.subject.other	Charge transfer	en
dc.subject.other	Electrolytes	en
dc.subject.other	Film growth	en
dc.subject.other	Mass transfer	en
dc.subject.other	Mathematical models	en
dc.subject.other	Porous materials	en
dc.subject.other	Ion migration	en
dc.subject.other	Oxide growth	en
dc.subject.other	Porous anodic alumina films	en
dc.subject.other	Alumina	en
dc.title	Transport phenomena inside the pores involved in the kinetics and mechanism of growth of porous anodic Al2O3 films on aluminium	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0022-0728(95)04341-1	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0022-0728(95)04341-1	en
heal.language	English	en
heal.publicationDate	1996	en
heal.abstract	The mass and charge transport phenomena inside the pores during the growth of porous anodic Al2O3 films, which are involved in the kinetics and mechanism of the oxide growth, were investigated and a relevant system of mathematical equations was formulated describing these phenomena in each general case. The solution of the above system of equations in the simplified case of a stirred bath and films with cylindrical pores, where it could be solved, showed that, during the oxide growth, the concentrations of H2SO4 and Al-2(SO4)(3) are highest and remain constant at pore bases and vary linearly between the pore base and film surface. Equations, correlating the electrolytes concentrations at pore bases during the oxide growth and the bath bulk concentrations with the charge transport numbers of the different ions, were also derived. These, referring to cylindrical pores, can be considered to be approximately applicable to the case of the real shape of elongated pores. Also, it was shown that the charge is transported inside the pores mainly by the migrating H+ and Al3+ ions white the contribution of the SO42- ions to the charge transport is insignificant.	en
heal.publisher	ELSEVIER SCIENCE SA LAUSANNE	en
heal.journalName	Journal of Electroanalytical Chemistry	en
dc.identifier.doi	10.1016/0022-0728(95)04341-1	en
dc.identifier.isi	ISI:A1996UH50900008	en
dc.identifier.volume	404	en
dc.identifier.issue	1	en
dc.identifier.spage	69	en
dc.identifier.epage	76	en