STELIAN, Carmen; VELÁZQUEZ, Matias; VEBER, Philippe; AHMINE, Abdelmounaim; SAND, Jean-Baptiste; BUŞE, Gabriel; CABANE, Hugues; DUFFAR, Thierry

doi:10.1016/j.jcrysgro.2018.04.003

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

STELIAN, Carmen
Science et Ingénierie des Matériaux et Procédés [SIMaP ]

VELÁZQUEZ, Matias
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

VEBER, Philippe
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Institut Lumière Matière [Villeurbanne] [ILM]

Langue

Article de revue

Ce document a été publié dans

Journal of Crystal Growth. 2018-06, vol. 492, p. 6-12

Elsevier

Résumé en anglais

Lithium molybdate Li2MoO4 (LMO) crystals of mass ranging between 350 and 500 g are excellent candidates to build heat-scintillation cryogenic bolometers likely to be used for the detection of rare events in astroparticle physics. In this work, numerical modeling is applied in order to investigate the Czochralski growth of Li2MoO4 crystals in an inductive furnace. The numerical model was validated by comparing the numerical predictions of the crystal-melt interface shape to experimental visualization of the growth interface. Modeling was performed for two different Czochralski furnaces that use inductive heating. The simulation of the first furnace, which was used to grow Li2MoO4 crystals of 3–4 cm in diameter, reveals non-optimal heat transfer conditions for obtaining good quality crystals. The second furnace, which will be used to grow crystals of 5 cm in diameter, was numerically optimized in order to reduce the temperature gradients in the crystal and to avoid fast crystallization of the bath at the later stages of the growth process.< Réduire

Mots clés en anglais

Convection

Computer simulation

Czochralski method

Lithium compounds

Oxides

Scintillator materials

DOI

http://dx.doi.org/10.1016/j.jcrysgro.2018.04.003

Project ANR

Croissance Czochralski de cristaux massifs Li2MoO4 pour les bolomètres scintillants utilisés en détection des évènements rares - ANR-16-CE08-0018

Origine

Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026