Browsing by Author "Cook, Lee M."

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    Leached antireflection surfaces Part 1. Characterization of the neutral solution process
    (Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1987) Cook, Lee M.; Mader, Karl-Heinz
    The kinetics of the formation of leached antireflective surfaces on borosilicate glasses by the neutral solution process is reviewed. The most important variables were found to be temperature, surface/volume ratio, concentration of network dissolution products in solution, and annealing rate. A pronounced mixed alkali effect was observed, indicating the importance of alkali/proton exchange in the formation of the leached layer.
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    Leached antireflection surfaces Part 2. Characterization of surfaces produced by the neutral solution process
    (Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1987) Cook, Lee M.; Marker III, A. J.; Mader, Karl-Heinz; Bach, Hans; Müller, Hartmut
    Characterization of leached antireflective surfaces on BK-7 optical borosilicate glass was undertaken using IR spectroscopy, IBSCA, scanning electron microscopy, transmission electron microscopy, electron microprobe, electron diffraction and analysis of reflectance spectra to provide more information on the leaching process. Leached surfaces were found to have double-layer characteristics. The outer layer consisted primarily of SiO2 and AI2O3, present as both χ-Al2O3 and amorphous species, while the inner layer was almost entirely SiO2. At very long leaching times two discrete films were observed.
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    Leached antireflection surfaces Part 3. Chemical release data for leached BK-7 borosilicate glass
    (Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1987) Cook, Lee M.; Mader, Karl-Heinz
    Chemical release data for glass constituents and adsorption data for solution constituents onto the glass surface are presented for aqueous leaching of BK-7 glass. Marked differences in release rates were observed between film-forming and non-film-forming solutions due to adsorption of solution-derived Al3+ ions onto the glass surface.
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    Leached antireflection surfaces Part 4. Proposed model for the neutral solution process
    (Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1987) Cook, Lee M.
    A proposed mechanism for the leaching process is given which centers on the effects of Al3+ adsorption from solution onto the glass surface. The mechanism is feit to be applicable to the behavior of a number of polyvalent metal cations known to strongly influence the aqueous corrosion of glass.