Influence of Calcium Addition on the Chemical Durability of the Model Alumino-Silicate Glasses in Aqueous Solutions

Dagmar Galusková; Miroslav Hnatko; Jozef Kraxner; Dušan Galusek; Pavol Šajgalík

doi:10.4028/www.scientific.net/KEM.512-515.1009

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 512-515Influence of Calcium Addition on the Chemical...

Influence of Calcium Addition on the Chemical Durability of the Model Alumino-Silicate Glasses in Aqueous Solutions

Abstract:

The corrosion resistance of liquid phase sintered (LPS) alumina ceramics in aqueous environments strongly depends on composition and chemistry of grain boundary glass formed during sintering. The chemical durability of model alumino-silicate glasses with various contents of CaO in aqueous solutions was therefore evaluated. Prepared glasses were corroded under hydrothermal conditions in deionized water under static conditions. The examination of surface morphology of corroded specimens after the contact with deionized water, together with the analysis of corrosion solution provided information on mechanism of dissolution of grain boundary glasses in LPS aluminas and confirmed that dissolution process is hindered due to saturation of solution with respect to leached elements. The initial dissolution rates for studied glasses were determined. The results are applicable for optimization and enhancement of corrosion resistance of LPS alumina under hydrothermal conditions.

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Periodical:

Key Engineering Materials (Volumes 512-515)

Pages:

1009-1014

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.512-515.1009

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Online since:

June 2012

Authors:

Dagmar Galusková, Miroslav Hnatko, Jozef Kraxner, Dušan Galusek, Pavol Šajgalík

Keywords:

Alumino-Silicate Glasses, Hydrothermal Corrosion

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