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arXiv · 0803.4109

Abrupt boundaries of intermediate phases and space filling in oxide glasses

K. Rompicharla·D. I. Novita·Ping Chen·P. Boolchand·M. Micoulaut·W. Huff
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Abstract

Modulated DSC measurements on bulk (Na2O)x(GeO2)1-x glasses show a sharp reversibility window in the 14% < x < 19% soda range, which correlates well with a broad global minimum in molar volumes. Raman and IR reflectance TO and LO mode frequencies exhibit anomalies between xc(1) = 14% (stress transition) and xc(2) = 19% (rigidity transition), with optical elasticity power-laws confirming the nature of the transitions . Birefringence measurements dramatize the macroscopically stress-free nature of the Intermediate Phase in the reversibility window.

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K. Rompicharla, D. I. Novita, Ping Chen, P. Boolchand, M. Micoulaut, W. Huff. 2008-03-28. Abrupt boundaries of intermediate phases and space filling in oxide glasses. https://doi.org/10.1088/0953-8984%2F20%2F20%2F202101

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