| The Reaction Between Borate Glass and Attacking
Agents-Part II: Action of Water on the Glasses
in the System Li20-B20 3 and K20-B203 |
C. R. DAS
Pages : 116-120
DOI : 10.1080/0371750X.1967.10855596 |
| Abstract |
| Reaction between water and lithium borate glasses containing 5~30 mole per cent
Li20 and potassium borate glasses containing 5-33.3 mole per cent K20 was studied
for periods ranging from a few seconds to 64 minutes and at temperatures 4°C to 29°C.
The amounts of alkali and B20 8 extracted were determined ~ titrametric methods.
From all of the glasses the amounts of alkali and B20 8 extracted increased lineurly
with time. The ratio of the constituents in the extract was found to be the same as in
the glasses indicating that the glasses dissolve as a whole. The activation energy for
the extraction from the lithium glasses passed through a minimum in the region of
15 to 20 mole per cent alkali, while for the potassium and sodium glasses maximum
was obtc.ined in the same composition region. Also a linear relationship could be obtained
between the rate of extraction of the constituent and the radius of the alkali
ions in glasses containing upto 15 mole per cent of alkali above which this relationship
was not obeyed. |
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