Startseite Influence of composition on corroding process of Na2O-K2O-CaO-ZrO2-SiO2 glasses
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Influence of composition on corroding process of Na2O-K2O-CaO-ZrO2-SiO2 glasses

  • I. Staňová EMAIL logo , A. Plško , J. Pagáčová und K. Šibíková
Veröffentlicht/Copyright: 1. Februar 2007
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Abstract

The corroding process of six glasses of the Na2O-K2O-CaO-ZrO2-SiO2 system with ZrO2content 0–2.13 mass % by water was observed during static tests at 121°C and pressure of 0.25 MPa in steam sterilizer. Significant increase of Na+ and K+ content in leachates was observed after the addition of ZrO2 into glass. Further increase of the content of ZrO2 in glasses slowed down the rate of Na+ and K+ leaching. The leaching process of SiO2 as well as Na+, K+, and Ca2+ ions was evaluated on the basis of comparison with model leaching processes. Variation of the concentrations of Na+, K+, Ca2+, and SiO2 in leachates with time was described by empirical equation. Observed changes in the initial leaching rates of Na+, K+, Ca2+, and SiO2 can be ascribed to the content of ZrO2 in glasses. The presence of ZrO2 in glasses reduced the overall rate of glass dissolution.

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Published Online: 2007-2-1
Published in Print: 2007-2-1

© 2007 Institute of Chemistry, Slovak Academy of Sciences

Heruntergeladen am 27.11.2025 von https://www.degruyterbrill.com/document/doi/10.2478/s11696-006-0088-7/pdf?lang=de
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