Stable long-period composition variations in demixing systems II. Experimental evidence in alkali borate glass melts

Döpkens, J.; Würz, U.; Frischat, G. H.

doi:10.1016/0022-3093(84)90190-x

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“…For example, Vogel 3 On the other hand, Golubkov et al 5 observed a small immiscibility boundary only for the Li 2 O-B 2 O 3 system but not for other alkali borate systems. Subsequently, Dopkens et al 6 reported the presence of a region of stable modulated structure above the top of the immiscibility gaps of the K 2 O-B 2 O 3 and Cs 2 O-B 2 O 3 systems that were determined by Shaw and Uhlmann; 4 however, Porai-Koshits et al 7 did not observe this microstructure. Controversy exists in the related B 2 O 3 -SiO 2 system, as well as in the Na 2 O-B 2 O 3 -SiO 2 system.…”

Section: Introductionmentioning

confidence: 97%

A Source of the Immiscibility Controversy of Borate and Borosilicate Glass Systems

Tomozawa

1999

Journal of the American Ceramic Society

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Because phase separation affects glass properties such as chemical durability, it is important to clarify this phenomenon, especially the immiscibility boundaries. Despite extensive investigation, controversy persists in regard to the immiscibility boundary of borate and borosilicate systems. The controversy has been suggested to originate from a change in glass structure with heat-treatment temperature or fictive temperature, which, in turn, causes a change in the immiscibility tendency.

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Section: Introductionmentioning

confidence: 97%