混合アルカリ鉛珪酸塩ガラスと硝酸リチウム融液との反応に及ぼすガラス組成の影響

抄録

The ion-exchange reactions of mixed-alkali lead silicate glasses with molten lithium nitrate were carried out for 1 to 5 hours at 380°C.
The results obtained are summarized as follows:
(1) In the ion-exchange reaction of a mixed-alkali glass containing two different kinds of alkalis, the diffusion of one type of alkali ion occurs independently of the other.
(2) For the mixed-alkali glasses containing Na₂O and K₂O, the amount exchanged becomes minimum at the molar concentration ratio (β_K) of about 0.5.
(3) For the simple alkali glasses containing Na₂O or K₂O, the amount exchanged decreases remarkably with increasing PbO content. But, for the mixed-alkali glasses, it varies very little with PbO content.