Method for controlling trace elements in low melting metals

摘要

The present invention relates to a trace element control method of a low-melting metal, a) step is charged into the boat the tube containing the target metal to be purified, b) the heating means is one end of the target metal provided on an outer surface of the tube stage is positioned at the side, c) the state that the target metal is heated to a local area except the the melt in the target metal phase, d) that the melted portion (molten zone) the liquid phase of the portion of the heating means in the solid a step at which the target metal cooling so that the determination unit (crystal zone), and e) is moved as the molten default as moved to the other end of the target metal in the said heating means a constant rate along the length of the tube , moved by the nature of the impurity element contained in the target metal parts assembling the melt which the impurity element to the other end of the target metal The step of focusing control may be made, including.;