Room temperature electrochemical growth of polycrystalline BaMoO4 films
Author
dc.contributor.author
Xia, Chang-Tai
Author
dc.contributor.author
Fuenzalida, V. M.
es_CL
Admission date
dc.date.accessioned
2013-12-26T19:36:50Z
Available date
dc.date.available
2013-12-26T19:36:50Z
Publication date
dc.date.issued
2003
Cita de ítem
dc.identifier.citation
Journal of the European Ceramic Society 23 (2003) 519–525
en_US
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/125865
Abstract
dc.description.abstract
The pH-concentration diagram for the formation of barium molybdate films on a metallic molybdenum substrate in a barium
hydroxide aqueous solution has been experimentally studied.Due to the relatively large solubility of the molybdate, the estimation
of film thickness from the weight gain was corrected by considering the substrate dissolution.The molybdenum substrates had a
preferential [100] crystallographic orientation, but the films exhibited no preferential orientation.It is suggested that the film grows
through a dissolution-precipitation mechanism and that nucleation begins only after the solution is locally saturated with barium
molybdate.Irregular intergrowth is frequent due to the high crystal growth rate.XPS measurements on samples that appeared
completely coated under SEM examination exhibited only the peaks corresponding to barium molybdate.On the other hand, the
substrates that appeared partially coated under SEM, when examinated by XPS exhibited the superposition of spectra of the
molybdate and of the uncoated molybdenum substrate.This allows the study of the degree of coating as a function of the solution
concentration and pH.
en_US
Patrocinador
dc.description.sponsorship
Financial support from FONDECYT under contrcts
3970012 and 11980002 is gratefully acknowledged.