NDLI: Criterion for estimating the number of phases in phase-separated glass of the Na2O-K2O-B2O3-SiO2 system by dilatometric analysis

Content Provider	Springer Nature Link
Author	Stolyar, S. V. Kon, M. Yu. Drozdova, I. A. Anfimova, I. N.
Copyright Year	2014
Abstract	The data of dilatometry and electron microscopy of four series of xNa2O-(8 − x)K2O-32B2O3-60SiO2, xNa2O-(8 − x)K2O-22B2O3-70SiO2, xNa2O-(6 − x)K2O-34B2O3-60SiO2, and xNa2O-xK2O-(40 − 2x)B2O3-60SiO2 phase-separated glass heat-treated at 550°C for 144 h (for glass containing 70 mol % SiO2) and 24 h (for glass containing 60 mol % SiO2) for separation on phases are summarized. The comparison of dilatometric data and electron microscopy allow one to conclude that glass with a difference between the onset deformation temperature and a glass transition temperature of more than 100°C is phase-separated; and glass with a difference of less than 65°C is single-phase. Curves for the glass transition temperature as a function of the K2O content reveal a mixed alkali effect, namely, minimums for glass containing 60% SiO2, and maximums for glass containing 70% SiO2.
Starting Page	298
Ending Page	302
Page Count	5
File Format	PDF
ISSN	10876596
Journal	Glass Physics and Chemistry
Volume Number	40
Issue Number	3
e-ISSN	1608313X
Language	English
Publisher	Pleiades Publishing
Publisher Date	2014-06-17
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Na2O-K2O-B2O3-SiO2 system phase separation dilatometry glass transition temperature onset deformation temperature electron microscopy Ceramics, Glass, Composites, Natural Methods Characterization and Evaluation of Materials Materials Science Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Materials Chemistry Condensed Matter Physics

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