Xps Study Of Ceramics And Glasses (In French)

Thanks to its sensitivity to the chemical environment, XPS is a precious aid to study the surfaces of ceramics and glasses. Variations of oxygen binding energy give information about the ionic/covalent character oxides and oxide glasses. Generally, we cannot directly relate the binding energy variations with the changes of the oxygen charges because Madelung effects can be important and act in the opposite way. Examples of XPS on ceramics and glasses after alteration in aqueous medium: the study of photoelectron lines of cations (uranium and cerium), before and after the surface alteration allows detecting changes of oxidation states of these cations.