Abrupt boundaries of intermediate phases and space filling in oxide glasses

Details Abrupt boundaries of intermediate phases and space filling in oxide glasses Abrupt boundaries of intermediate phases and space filling in oxide glasses

2008-03-28

arxiv.org/abs/0803.4109v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

Scientific paper

10.1088/0953-8984/20/20/202101

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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