The fluctuations of Zn impurity Concentration Profile in KCl crystals growth by various pulling rate Czochralski method

Document Type : Original Article


1 Nuclear Strategic Studies Research School, Photonic and quantum technology research school, Tehran, Iran

2 lian parto fan gostar co., Tehran,Iran


Single crystals of KCl(Zn) using different amounts of Zn impurity (0.5 and 1.0 mole percents) with and without rotating crucible were grown by Czochralski method. The speed of rotation and pulling rate of the seed crystal were adjusted at, 10 rpm and 12 mm per hour respectively. The crucible was rotated, in the opposite direction of crystal rotation, with 5 rpm. Crystals, with Zn impurity of 0.5 % grown by both rotating and fixed crucible, were found to be transparent and uniform. Since the KCl crystals with Zn impurity of 1% were not transparent, they were found not suitable for optics. Furthermore, it was observed that the upper and middle parts of the crystals grown with 1 mol% Zn impurity are more transplant but the lower part includes transplant and cloudy layers. The results show that a convenient rotation and pulling rate can improve the stability and uniformity of impurity distribution along the crystals.


Main Subjects

© 2023 The Author(s). Journal of Progress in Physics of Applied Materials published by Semnan University Press. This is an open access article under the CC-BY 4.0 license. (

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Volume 3, Issue 1 - Serial Number 4
(In honor of 80th birthday of Prof. P. Ramasamy)
November 2023
Pages 43-47
  • Receive Date: 17 June 2023
  • Revise Date: 12 August 2023
  • Accept Date: 21 August 2023