Formulation of a holistic model for the kinetics of steady state growth of porous anodic alumina films

Patermarakis, G; Chandrinos, J; Masavetas, K

dc.contributor.author	Patermarakis, G	en
dc.contributor.author	Chandrinos, J	en
dc.contributor.author	Masavetas, K	en
dc.date.accessioned	2014-03-01T01:26:22Z
dc.date.available	2014-03-01T01:26:22Z
dc.date.issued	2007	en
dc.identifier.issn	1432-8488	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18043
dc.subject	Al anodising	en
dc.subject	Holistic kinetic model	en
dc.subject	Porous anodic films	en
dc.subject	Solid state ionic transport	en
dc.subject	Steady state	en
dc.subject.classification	Electrochemistry	en
dc.subject.other	Anodic alumina films	en
dc.subject.other	Kinetic models	en
dc.subject.other	Oxalic acid	en
dc.subject.other	Solid state ionic transport	en
dc.subject.other	Carboxylic acids	en
dc.subject.other	Film growth	en
dc.subject.other	Growth rate	en
dc.subject.other	Negative ions	en
dc.subject.other	Porous materials	en
dc.subject.other	Positive ions	en
dc.subject.other	Reaction kinetics	en
dc.subject.other	Alumina	en
dc.title	Formulation of a holistic model for the kinetics of steady state growth of porous anodic alumina films	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s10008-006-0259-z	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s10008-006-0259-z	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	A holistic model for the kinetics of steady state growth of porous anodic alumina films in oxalic acid, H2C2O4, solution was developed not necessarily requiring the adoption of any 'a priori' mechanism of porous film growth. By this model the effect of anodising conditions on the transport numbers of Al3+ cations and O2- anions across the barrier layer was revealed. The cation (anion) transport number decreased (increased) with current density, increased (decreased) with temperature and was unaffected by the concentration of electrolyte or pH. A complementary atomistic-ionic kinetic model was developed that fully justified these results and showed that the activation distances of Al3+ and O2- transport are comparable, but the activation energy of Al3+ transport is lower mainly due to the much smaller size of Al3+. The validity of the model was tested on the basis of SEM observations, while structural features and the rate of pore wall dissolution were determined. © Springer-Verlag 2007.	en
heal.publisher	SPRINGER	en
heal.journalName	Journal of Solid State Electrochemistry	en
dc.identifier.doi	10.1007/s10008-006-0259-z	en
dc.identifier.isi	ISI:000248615100007	en
dc.identifier.volume	11	en
dc.identifier.issue	9	en
dc.identifier.spage	1191	en
dc.identifier.epage	1204	en