Glass Science and Technology
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- ItemGlasses to Turn On Genes(Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 2004) Hench, Larry L.[no abstract available]
- ItemNovel Photonic Glasses for Fiber-Optic Amplifiers(Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 2004) Heo, JongDevelopment of novel glass hosts for the fiber-optic amplifiers was introduced with a special attention on the O-band amplifiers operating at 1.31 μm. Upon the addition of alkali halide (especially CsBr) into Ge-Ga-S glasses, the intensity of the 1.31 μm emission from Dy³⁺ (⁶F_(1 1/2)*⁶H_(9/2) →⁶H_(15/2)) increased sharply at the expense of the 1.75 μm emission intensity (⁶H_(1 1/2)→⁶Hi_(15/2)). The lifetimes of the 1.31 μm emission level also increased upto 1580 μs. The nearest neighbors of Eu³⁺ ions, or rare-earth ions in this glass, are composed of halogen ions that are part of well-structured complex such as tetrahedral [GaS_(3/2)Br]¯ subunit and/or Ga₂Br₆. Similar enhancement in the emission properties was also observed in Tm³⁺ and Ho³⁺-doped glasses with the addition of an appropriate amount of CsBr into sulfide glasses.
- ItemCorrosion of Glass(Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 2004) Helebrant, A.; Jiřička, A.; Jiřičková, JThe paper reviews the different models describing interaction between glasses and aqueous solutions. It is shown the development of kinetic and thermodynamic models (Rana & Douglas, HIaváč & Matěj, Isard et al., Boksay & Doremus, Strachan, Grambow, Conradt, Aagaard & Helgeson). The models are compared from the point of view of different mechanisms and partial processes considered during model development. Model based on combination of Boksay & Doremus and Strachan models is shown, considering the glass corrosion as a combination of three simultaneous processes: 1. Glass matrix dissolution with two subsequent steps (surface reaction and surface reaction products transport through the precipitated layer and/or through Solution layer adjacent to the glass surface) 2. Leaching of moveable ions (A⁺) due to interdiffusion of HsO⁺ - A⁺ 3. Precipitation of dissolved glass components and/or Solution components on the glass surface. Finally, the outlook for future development of glass corrosion modelling is suggested, based on combination of Boksay & Doremus, Strachan, Conradt and Aagaard & Helgeson approach.
- ItemCrystalization in High Iron Containing Silicate Glasses - Electron Microscopy Investigation(Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 2004) Völksch, Günter; Harizanova, Ruzha; Rüssel, Christian; Mitsche, Stefan; Pölt, Peter[no abstract available]
- ItemBiomimetic Preparation of Bioactive Layers(Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 2004) Skrčená, A.; Hejda, M.; Cílová, Z.; Helebrant, A.[no abstract available]