EFFECT OF IONIC EXCHANGE UPON THE BEHAVIOR OF SODA LIME SILICATE GLASS

Thermally stimulated depolarization currents and some spectrophotometr ic characteristics were measured for soda lime silicate glass in as re ceived state and after exchange with ionic silver. Both, the effective ness of the exchange and the form of silver within the glass framework were modified by thermal treatment of the exchanged specimens. It has been shown that some of the bands recorded by TSDC technique are rela ted with electrical polarization phenomena. The origin of these polari zations has been ascribed to more or less localized motion of sodium i ons which in the near-surface layers of specimens became disturbed by various silver species.