caa a22 4500 467923744 CHVBK 20180406152924.0 cr unu---uuuuu 170328e20060301xx s 000 0 eng 10.1134/S1087659606020015 doi (NATIONALLICENCE)springer-10.1134/S1087659606020015 Specific features of the kinetics of structural relaxation in microinhomogeneous glasses [Elektronische Daten] [I. Bus'ko, O. Golubeva, V. Golubkov] The kinetics of structural relaxation in vitreous boron oxide and sodium borate glass containing 5.5 mol % Na2O during isothermal treatment at a number of temperatures after cooling from high temperatures and a sharp increase in the temperature of samples stabilized at T < T g for different times is studied by the small-angle X-ray scattering (SAXS) technique. It is shown that, as the fictive temperature of samples approaches the temperature at which the supercooled liquid transforms into a noncrystalline solid state, the times of development of a structural inhomogeneity that arises in the samples after a drastic increase in the temperature increase considerably in a narrow temperature range (1-2 K). The intensity of small-angle X-ray scattering by a micro-inhomogeneous structure formed in the course of relaxation processes in chemically inhomogeneous glasses substantially exceeds the SAXS intensity observed during structural relaxation of vitreous boron oxide. This is associated with the increase in the sizes of structural inhomogeneity regions in the matrix in heterogeneous samples as compared to the sizes of similar regions in homogeneous glasses. Stresses arising in heterogeneous samples during structural relaxation are responsible for the interference effects that substantially affect both the SAXS intensity at angles close to zero and, correspondingly, the light scattering intensity. Pleiades Publishing, Inc., 2006 Bus'ko I. Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, ul. Odoevskogo 24/2, 199155, St. Petersburg, Russia aut Golubeva O. Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, ul. Odoevskogo 24/2, 199155, St. Petersburg, Russia aut Golubkov V. Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, ul. Odoevskogo 24/2, 199155, St. Petersburg, Russia aut Glass Physics and Chemistry Nauka/Interperiodica 32/2(2006-03-01), 123-135 1087-6596 32:2<123 2006 32 10720 https://doi.org/10.1134/S1087659606020015 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1087659606020015 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bus'ko I. Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, ul. Odoevskogo 24/2, 199155, St. Petersburg, Russia aut NATIONALLICENCE 700 1- Golubeva O. Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, ul. Odoevskogo 24/2, 199155, St. Petersburg, Russia aut NATIONALLICENCE 700 1- Golubkov V. Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, ul. Odoevskogo 24/2, 199155, St. Petersburg, Russia aut NATIONALLICENCE 773 0- Glass Physics and Chemistry Nauka/Interperiodica 32/2(2006-03-01), 123-135 1087-6596 32:2<123 2006 32 10720 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer