Glass Physics and Chemistry

, Volume 37, Issue 3, pp 252–257 | Cite as

Kinetics of early stages of phase separation in glasses of the PbO-B2O3 system

Article

Abstract

Kinetics of changes in sizes of phase regions and volumes at the early stages of the phase separation of glasses in the PbO-B2O3 system has been studied using small-angle X-ray scattering (SAXS). The existence of the interval of heating durations in which the changes in the sizes of the phase regions and volumes are small so that it is possible to approximately consider that the structure is in a relatively stable state has been experimentally established. The relative phase volumes and compositions in glasses of the studied system are close to the equilibrium ones already for the sizes (radii) of the regions of the separated phase of about 15–20 Å and the Ostwald ripening (coalescence) stage begins. Maxima due to the interparticle interference have been observed in the angular dependences of the SAXS intensities. This indicates ordering in the distribution of the phase regions.

Keywords

phase separation structure small-angle X-ray scattering coalescence 

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Copyright information

© Pleiades Publishing, Ltd. 2011

Authors and Affiliations

  1. 1.Grebenshchikov Institute of Silicate ChemistryRussian Academy of SciencesSt. PetersburgRussia
  2. 2.Faculty of ChemistrySt. Petersburg State UniversitySt. PetersburgRussia

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