Question

What is Zone refining method?

Answer 1

Zone refining: In zone refining, a molten zone is caused to travel slowly along a rod of solid. Since the impurities are usually more soluble in the liquid than in the solid they are carried forward with the molten zone so that the recrystallized material is purified at the end where the zone starts its traverse.

The process is repeated a number of times to achieve a high degree of purification. It is mainly used in purification of semi-conductor.