Crystallization of Yttrium and Samarium Aluminosilicate Glasses

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Lago, Diana Carolina ; Prado, Miguel Oscar (2013)
  • Publisher: Elsevier
  • Journal: volume 48, pages 10-16 (issn: 1875-3892)
  • Related identifiers: doi: 10.1016/j.phpro.2013.07.003
  • Subject: SAMARIUM | Physics and Astronomy(all) | ALUMINOSILICATE GLASS SURFACE CRYSTALLIZATION | YTTRIUM ALUMNINOSILICATE GLASS | GLASS CERAMIC | Ingeniería de los Materiales | INGENIERÍAS Y TECNOLOGÍAS | Cerámicos

Aluminosilicate glasses containing samarium and yttrium (SmAS and YAS glasses) exhibit high glass transition temperatures, corrosion resistance, and glass stability on heating which make them useful for technological applications. Yttrium aluminosilicate glass microspheres are currently being used for internal selective radiotherapy of liver cancer. During the preparation process, crystallization needs to be totally or partially avoided depending on the final application. Thus knowing the crystallization kinetics can help to prevent or avoid it, by designing a proper thermal pathway. In this work we studied the crystallization kinetics of YAS and SmAS glasses. It was found that both, YAS and SmAS glasses crystallize from the surface. SmAS glass presented lower densities of nucleation sites. The results also showed that the crystal growth apparent enthalpy is larger for SmAS glasses. Fil: Lago, Diana Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Prado, Miguel Oscar. Comision Nacional de Energia Atomica. Gerencia de Area de Aplicaciones de la Tecnologia Nuclear. Gerencia de Investigacion Aplicada. Grupo de Materiales Nucleares; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Area de Energía Nuclear. Instituto Balseiro; Argentina