(A) In a zone refining process, show that the subsequent impurity concentration along the refining direction...

(A) In a zone refining process, show that the subsequent impurity concentration along the refining direction a is given by: ?"(?) = ??((1 − ?)+,- where c0 is the initial impurity concentration which is uniform throughout the specimen, and k is the partition coefficient.

(B) Silicon is purified by a process of zone refining. If it contains an impurity (1ppm) with a partition coefficient k = 10^-5, how much would remain in the middle of the bar after a zone pass?

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Answer #1

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