 |
Influence of composition on corroding process of Na2O-K2O-CaO-ZrO2-SiO2 glasses
Staňová, I., Plško, A., Pagáčová, J. and Šibíková, K. Influence of composition on corroding process of Na2O-K2O-CaO-ZrO2-SiO2 glasses Chemical Papers, Vol.61, No. 1, 2007, 11-15
|
|
|
Document type:
|
Článok z časopisu / Journal Article |
|
Collection:
|
Chemical papers
|
|
| Author(s) |
Staňová, I.
Plško, A.
Pagáčová, J.
Šibíková, K.
|
| Title |
Influence of composition on corroding process of Na2O-K2O-CaO-ZrO2-SiO2 glasses
|
| Journal name |
Chemical Papers
|
| Publication date |
2007
|
| Year available |
2007
|
| Volume number |
61
|
| Issue number |
1
|
| ISSN |
0366-6352
|
| Start page |
11
|
| End page |
15
|
| Place of publication |
Poland
|
| Publisher |
Versita
|
| Collection year |
2007
|
| Language |
english
|
| Subject |
250000 Chemical Sciences
250200 Inorganic Chemistry
|
| Abstract/Summary |
he 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.
|
|
|
