Preparation of 6N5 (99.99995%-Pure) Cadmium, Zinc, and Tellurium by Crystallization Methods

— This paper describes a detailed study aimed at developing technological principles of the preparation of 99.99995%-pure Cd, Zn, and Te by crystallization purification methods. We have analyzed the thermophysical properties of Cd, Zn, Te, and structural materials of the equipment involved; substant...

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Bibliographic Details
Published in:Inorganic materials 2022-09, Vol.58 (9), p.983-989
Main Authors: Abryutin, V. N., Potolokov, N. A., Maronchuk, I. I., Brekhovskikh, M. N., Menshchikova, T. K., Fedorov, V. A.
Format: Article
Language:English
Subjects:
Cadmium
Chemistry
Chemistry and Materials Science
Crystallization
Directional solidification
Impurities
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
Tellurium
Thermophysical properties
Zinc
Zone melting
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Summary:— This paper describes a detailed study aimed at developing technological principles of the preparation of 99.99995%-pure Cd, Zn, and Te by crystallization purification methods. We have analyzed the thermophysical properties of Cd, Zn, Te, and structural materials of the equipment involved; substantiated the choice of graphite as a crucible material; and determined its engineering features. We have studied impurity distributions in Cd, Zn, and Te in crystallization processes and determined effective performance parameters of the materials refining process in horizontal directional solidification and zone melting steps. The results have allowed us to obtain 99.99995 to 99.99999%-pure Cd, Zn, and Te in terms of 30 major impurities, with a maximum product yield of up to 85%.
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168522090011