What is the purpose of zone refining? In a binary phase diagram (pressure omitted), what is the maximum number of phases which can coexist for at least one degree of freedom?
Ans:
Zone Refining : Zone refining process is based on the fact that first solid to crystallize in a two component system is normally purer than liquid as impurity by repeating the sequence of operations a few times.
Max. No. of Phases: Two