containing 2.5 and 5.0 mol % Na2O and on the kinetics of structural relaxation in vitreous boron oxide and
sodium borate glasses is studied by the small-angle X-ray scattering (SAXS) technique. It is demonstrated that
an increase in the water content brings about an increase in the size of the inhomogeneity regions and a decrease
in the mean square of the difference between the electron densities
(
)2
for the microinhomogeneous struc-ture. The inference is made that water has a catalytic effect on the aggregation of alkali borate structural units.
The kinetic dependence of the intensity of small-angle X-ray scattering by thermal density fluctuations is
described by the Kohlrausch equation. The exponent
in the Kohlrausch equation is close to 1.0 for “dry” glasses and decreases to 0.5 for glasses containing 0.7–1.0 mol % H2O.