Domaines d'existence et de cristallisation de borates et aluminoborates de gadolinium

Abstract
Rare earth borates and aluminoborates single crystals were investigated for their applications as laser host materials and scintillators. The investigation of the ternary systcm Ln ₂O ₃-Al ₂O ₃-B ₂O ₃ (Ln = Gd) was undertaken in order to determine the thermal behavior, the best conditions of the growth from a melt and their ability to be reproduced. In first, the different solid phases formed in the binary system Gd ₂O ₃-B ₂O ₃ were studied and then the crystallization field of each phase was defined as a function of composition and temperature.