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Author: Reisch, Renate × End date: 1996 ×

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    Investigation of the dissolution of metallic Silicon spheres in a container glass melt
    (Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1996) Reisch, Renate; Stachel, Dörte; Traufelder, Steffi
    On laboratory scale, metallic silicon spheres obtained from industrial flint glass production and spectroscopically pure silicon were annealed in flint glass, amber glass and green glass cullet melts. The dissolution behavior of sihcon was investigated in the temperature range of 1200 to 1500°C in normal air a nd sulfur dioxide atmosphere. Silicon dissolves by formadon of a thin silicon dioxide layer at the surface of the spheres only at high temperatures and long annealing times. The dissolution of silicon is a process with low reaction rate and a complex reaction mechanism due to interactions of Silicon with oxygen, hydroxide ions and polyvalent ions in the Container glass melt.
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    Thermal behavior of metallic aluminum in a Container glass melt
    (Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1996) Reisch, Renate; Stachel, Dörte; Traufelder, Steffi; Tessmann, Elke
    The thermal behavior o f metallic aluminum was studied in the temperature ränge of 1100 to 1500°C in a Container glass melt. The dissolution of the metal was determined as a function of aluminum input, glass volume, melting time and the type of glass used. By analogy, melts containing magnesium cuttings were also investigated. With the aid of electron microscopy, it was possible to establish a reaction scheme of Oxidation and reduction processes. Only 2 to 3 % of the aluminum introduced causes the formation of silicon spheres. The main part will be oxidized through reactions with oxygen, hydroxide and polyvalent ions in the melt.
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    Comparison of metallic Silicon in clusions in industrial Container glass and laboratory melts
    (Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1996) Reisch, Renate; Stachel, Dörte; Tessmann, Elke
    Metallic silicon inclusions in glasses obtained from different Container glass companies and from laboratory melts by addition of metallic cuttings (aluminum, magnesium) were examined using light and Scanning electron microscopy The composition of the formed silicon spheres is always similar. The metallic inclusions are composed of silicon with a very small part of fmely distributed iron-Silicon alloys. In amber and green glass chromium, manganese and copper are additionally enriched as further main elements in these alloying phases. Differences in the composition of silicon spheres are due to the dwell time and the concentration of polyvalent ions in the melt.