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  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Investigation of the Interaction of Quartz with H2 under Supply of Mechanical Energy. III. Temperature-programmed DesorptionThe thermodesorption of H2 from quartz, which has been mechanically stressed under H2, show one relatively broad main peak with a maximum between 760 and 580 K. Increasing degree of disorder of the solid shifts the maximum towards lower temperatures. The H2 thermodesorption may be explained as an activated diffusion process in the partially crystalline quartz. It is considered in connexion with structural and other changes of the quartz, e. g. with the concentration decreases of ≡Si· and =SiH/=SiOH radicals as well as ≡SiH and ≡SiOH groups.
    Notes: Die H2-Thermodesorption von in H2 mechanisch bearbeitetem Quarz weist einen relativ breiten Hauptpeak mit einem Maximum zwischen 760 und 580 K auf. Das Maximum wird mit steigendem Störgrad des Festkörpers zu tieferen Temperaturen verschoben. Die H2-Thermodesorption kann als aktivierter Diffusionsprozeß im partiell-kristallinen Quarz erklärt werden und wird in Verbindung mit strukturellen und anderen Veränderungen am Quarz, z. B. dem Abbau von ≡Si· - und =SiH-/=SiOH-Radikalen sowie ≡SiH- und ≡SiOH-Gruppen verfolgt.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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