Effect of impurities on the crystal growth from solutions - a new kinetic model

• Type: Article in International Conference Proceedings Book
• Date: 2004

Authors

P. M. Martins (Author) FEUP; F. Rocha (Author) FEUP

Conference proceedings International

Title: Congresso Brasileiro de Engenharia Química, XV COBEQ

Congresso Brasileiro de Engenharia Química, XV COBEQ

Curitiba, Brasil, 26 a 29 de Setembro de 2004

Scientific classification

CORDIS: Technological sciences > Engineering > Chemical engineering

Other information

Abstract (EN): A new approach to the phenomena of impurity adsorption during crystal growth is presented. We consider that the adsorption of elements onto the active sites of the crystal surface is a competitive process between the solute and the impurity molecules. Based on that, a general equation relating the face growth rates with the supersaturation and the impurity concentration is derived. The main experimental evidences known from the literature on crystal growth kinetics in the presence of impurities are used to test the proposed model. So far, we conclude that the theoretical statements of the competitive adsorption model are generally in agreement with the experimental facts.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6