Zone Refining of Metals: With Diagram | Metallurgy

Pfann's technique of zone-refining has been applied to the purification of many metals, particularly silicon and germanium. The high purity silicon required for transistors for the electronic industry is produced by the concept of purification based on zone-refining. The concept is based on the non-equilibrium behaviour during solidification of the solid solution alloys. Purification of a metal by zone-melting (i.e., [...]