Simulation for purification process of high pure germanium by zone refining method

In this research, a computer program was written to calculate the distribution of impurities after many times of passing the melt section through the sample. This code is used to obtain necessary conditions to achieve highly pure germanium with impurity less than 1ppb. Finally, the behaviour of different impurities in zone refining process was simulated to obtain important parameters such as the number of pass through the sample for a desired purity of the material. It was found, If C0=E-4 and L/l=20, after 100 passes, it would be required to remove 12.25 l from the front surface and 5.35 l from the end surface of the sample to have maximum 1ppb impurity concentration in remaining germanium material.