Étude expérimentale des paramètres thermiques qui conditionnent la pureté de monocristaux de gallium obtenus par tirage

Abstract Crystal shape, temperature gradient at the interface and efficiency of solute rejection are studied as a function of the initial melt temperature for gallium single crystals grown by the pulling technique. In an alloy containing about 100 ppm Ag, the critical temperature gradient where a constitutional supercooling occurs, is found to be close to 8.8°C cm −1 .