Diffusion coefficient of K+ in ion exchanged glasses calculated from the refractive index and the Vickers hardness profiles

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:23:47Z
dc.date.available2014-05-20T15:23:47Z
dc.date.created2014-05-20T15:23:47Z
dc.date.issued2006-09-15
dc.identifierJournal of Non-crystalline Solids. Amsterdam: Elsevier B.V., v. 352, n. 32-35, p. 3567-3571, 2006.
dc.identifier0022-3093
dc.identifierhttp://hdl.handle.net/11449/34489
dc.identifier10.1016/j.jnoncrysol.2006.02.115
dc.identifierWOS:000240706000035
dc.identifier7698772123076672
dc.description.abstractThe top faces of float glass samples were exposed to vapors resulting from the decomposition of KNO3 at 565 degrees C for up to 32 h. X-ray dispersive spectra (EDS) show that K+ ions migrate into the glass. The K+ concentration profile was obtained and its diffusion coefficient was calculated by the Boltzmann-Matano technique. The mean diffusion coefficient was approximately 10 X 10(-11) cm(2) s(-1). It was observed that the refractive index and the Vickers hardness decrease with the depth (after the removal of successive layers), and their profiles were thus obtained. These profiles enabled the calculation of the diffusion coefficient of K+ through the Boltzmann-Matano technique, with mean results ranging between 6 x 10(-11) and 30 x 10(-11) cm(2) s(-1). (c) 2006 Elsevier B.V. All rights reserved.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationJournal of Non-Crystalline Solids
dc.relation2.488
dc.relation0,722
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjection exchange
dc.subjectSEM
dc.subjecthardness
dc.titleDiffusion coefficient of K+ in ion exchanged glasses calculated from the refractive index and the Vickers hardness profiles
dc.typeArtículos de revistas


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