Process and apparatus for continuously controlling the undercooling of the solidification front of a single crystal during its development, and use in its growth control

摘要

the present invention is directed to a process and a device for controlling supercooling of a single crystal during the development.;the continuous potential difference between a point (74) of the crystal (66) during training and a point (72) of a solid part (38) of the material separated from the liquid (36) via an interface (40) for different reference of the solidification front (64).this potential difference is used to determine the change of temperature due to supercooling at the solidification front (64) and the dopant concentration in the crystal forming.;application to the control of the composition of a single crystal during the development.