VERFAHREN ZUR HERSTELLUNG EINER LOESUNGSZONE ZUM ZUECHTEN VON HALBLEITERVERBINDUNGEN.

摘要

1. Process for the preparation of a binary initial solvent zone permitting crystallization in the form of a monocrystal of a polycrystalline ternary or quaternary compound having a given composition and containing cadmium and mercury, characterized in that it comprises the following stages : - determining on the phase equilibrium diagram of the component having two axes respectively giving the cadmium and mercury concentration and the isotherms (TA , T'A , TC , T'C ), in which each liquid is in thermodynamic equilibrium with its solid at a given temperature, the point (S) representing the composition of said compound, - plotting on said phase diagram, the curve (BB') representing the compositions of the solvent zone in thermodynamic equilibrium with the compound, - choosing on said diagram, the temperature (TA , T'A ) at which said crystallization has to take place, the initial solvent zone raised to said temperature (TA , T'A ) being able to dissolve the ternary or quaternary polycristalline compound until a respectively ternary or quaternary liquid solvent zone is obtained in thermodynamic equilibrium with said compound and from which said crystallization is carried out and - establishing the straight line passing through point (S) and the interception point (A) of said curve (BB') with the isotherm associated with the chosen crystallization temperature, the interception of said line with one of said axes fixing the composition (C, C') of the initial binary solvent zone and the temperature (TC , T'C ) at which said initial binary solvent zone has to be prepared.