In situ study of the crystallization mechanism in LiNbO$_3$-SiO$_2$ glasses - Université de Bordeaux Accéder directement au contenu
Article Dans Une Revue Physics and Chemistry of Glasses - European Journal of Glass Science and Technology Part B Année : 2013

In situ study of the crystallization mechanism in LiNbO$_3$-SiO$_2$ glasses

Marc Dussauze
Vincent Rodriguez
  • Fonction : Auteur
  • PersonId : 917797

Résumé

A crystallization study of lithium niobium silicate glass with the molar composition 35Li$_2$O.25Nb$_2$O$_5$.40SiO$_2$ is reported using in situ techniques (x-ray diffraction, Raman spectroscopy and environmental electron microscopy) at high temperatures. Those techniques reveal that the surface crystallization begins at Tg with c-axis crystallites oriented perpendicular to the surface. Precipitation of nuclei, followed by growth and coalescence processes, induce the formation of particles and spherulites 0*5-4 μm diameter in size. A strong difference between surface and bulk crystallization has been observed with bulk crystallization yielding to 30 μm diameter size spherulites. Those original spherulite shapes could be the origin of the macroscopic bulk second harmonic generation (SHG) signal.

Domaines

Matériaux
Fichier principal
Vignette du fichier
2013-094-tap.pdf (1.87 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-00826451 , version 1 (26-07-2022)

Identifiants

  • HAL Id : hal-00826451 , version 1

Citer

Hélène Vigouroux, Evelyne Fargin, Bruno Le Garrec, Marc Dussauze, Vincent Rodriguez, et al.. In situ study of the crystallization mechanism in LiNbO$_3$-SiO$_2$ glasses. Physics and Chemistry of Glasses - European Journal of Glass Science and Technology Part B, 2013, 54 (2), pp.84-88. ⟨hal-00826451⟩
325 Consultations
31 Téléchargements

Partager

Gmail Facebook X LinkedIn More