Browsing by Author "Laube, Michael"
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- ItemComposition of titania coatings deposited by different techniques(Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1994) Laube, Michael; Wagner, Wolfgang; Rauch, Friedrich; Ottermann, Clemens; Bange, Klaus; Niederwald, HansjörgQuantitative dement concentrations in titania films produced by different deposition techniques (evaporation, sputtering, ion-assisted deposition, ion plating and dip coating) have been determined by means of Rutherford Backscattering Spectrometry and Nuclear Reaction Analysis with the reaction ¹H(¹⁵N, αγ)¹²C. Large differences of the hydrogen content are found for the various production techniques and the related deposition parameters, which correlate with the refractive index of the respective film. In dependence on the deposition conditions the oxygen/titanium ratio of the investigated titania films varies between 1.95 and 2.09. The impurities detected in the films (tantalum, molybdenum, silicon, argon, carbon, sodium) can be related to specific deposition conditions. Three multilayer interference systems containing TiO₂ and SiO₂ show large variations in hydrogen content resembling those found for single TiO₂ films.
- ItemHydrogen/lithium interdiffusion in a lithium aluminosilicate glass studied by NRA and RBS(Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1999) Dersch, Oliver; Laube, Michael; Rauch, Friedrich; Becker, OtmarSamples of a lithium aluminosilicate (LAS) glass, a model glass for technical LAS glass used in the production of glass ceramics, were treated in hot sulfuric acid and analyzed using Nuclear Reaction Analysis (NRA) techniques for determining hydrogen and lithium depth profiles in the surface layer. It was found that the depth profiles of these two elements are fully complementary, showing that H⁺/Li⁺ ion exchange takes place during the treatment. As revealed by Rutherford Backscattering Spectrometry (RBS) measurements the other glass constituents were not affected by the treatment.