The investigation of thermally treated glasses of controlled porosity by means of differential thermal analysis |
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Authors: | A L Dawidowicz P Staszczuk |
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Institution: | (1) Institute of Chemistry, Maria Curie-Sk odowska University, M. Curie-sk odowska SQ. 3, 20-031 Lublin, Poland |
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Abstract: | Some of the materials used as chromatography packings, adsorbents or catalyst supports are glasses of controlled porosity (CPGs). The chemical structure of these materials can easily be changed by heating the porous glass. Such thermal modification leads to the enrichment of the CPG surface in boron atoms. The long exposure of CPGs to thermal treatment can even cause the formation of borate crystals in the pores of the glasses. This paper considers the application of thermal analysis to the investigation of porous glasses heated for different periods of time.
Zusammenfassung Einige der als chromatographische Säulenpackungen, Adsorbenten oder Katalysatorträger verwendeten Materialien sind Gläser mit definierter Porosität (CPGs). Die chemische Struktur dieser Materialien kann leicht durch Erhitzen verändert werden. Eine solche thermische Modifizierung führt zu einer Anreicherung von Bor in der Oberflächenschicht. Eine langdauernde Erhitzung der CPGs kann sogar zur Bildung von Boratkristallen in den Poren der Gläser führen. Im vorliegenden Artikel wird die Anwendung der thermischen Analyse zur Untersuchung von porösen Gläsern in Abhängigkeit von der Erhitzungsdauer behandelt.
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