6533b860fe1ef96bd12c38dc
RESEARCH PRODUCT
Surface versus bulk composition of a phosphate glass
W. MeiselPhilipp GütlichD. Sprengersubject
Valence (chemistry)Mössbauer effectChemistrytechnology industry and agricultureAnalytical chemistrychemistry.chemical_elementSurfaces and InterfacesGeneral ChemistryCondensed Matter PhysicsOxygenSurfaces Coatings and FilmsPhosphate glassX-ray photoelectron spectroscopyConversion electron mössbauer spectroscopyMaterials ChemistrySurface layerLeaching (metallurgy)description
Transmission and conversion electron Mossbauer spectroscopy as well as photoelectron spectroscopy were applied to study alterations of the surface layer of an iron containing industrial phosphate glass as compared with its bulk. In the surface layer, after polishing and exposure to ambient atmosphere, Fe 2+ is partially oxidized to Fe 3+ . This oxidation, however, does not increase the O/P ratio in this layer, because it goes along with a strong leaching of network modifiers. This leaching leads to a net decrease of the O/P ratio because it overcompensates the relative oxygen increase by Fe 2+ oxidation and by uptake of water
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1994-07-01 | Surface and Interface Analysis |