| 摘要 |
<p>A method for separating impurities from a gallium material containing impurities, which comprises providing the gallium material in a liquid state in a container, allowing the coagulation of gallium to proceed gradually from the surface of the inner wall of the container toward center portion thereof, in a manner such that a cylinder formed by a coagulation interface gradually reduces in its diameter, separating a liquid phase remaining in the central portion from a coagulated phase before the coagulation of the whole material in the container and repeating the above-described procedure using the resultant coagulated phase as a gallium material until a desired purity is achieved. The formation of a gallium product having a purity suitable to preparation of a compound semiconductor can be confirmed by determining the concentrations of impurities in a Ga material being separated from the coagulated phase and containing condensed impurities.</p> |
