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X-Ray diffraction line-broadening study on two vibrating, dry-milling procedures in kaolinites

Published online by Cambridge University Press:  01 January 2024

Pablo Pardo ,
Joaquín Bastida ,
Francisco J. Serrano ,
Rafael Ibáñez  and
Marek A. Kojdecki
Pablo Pardo*
Affiliation:
Departamento de Geología, Universidad de Valencia, 46100 Burjasot, Valencia, Spain Instituto de Ciencia de Materiales, Universidad de Valencia, P.O. 22085 46071 Valencia, Spain
Joaquín Bastida
Affiliation:
Departamento de Geología, Universidad de Valencia, 46100 Burjasot, Valencia, Spain
Francisco J. Serrano
Affiliation:
Departamento de Geología, Universidad de Valencia, 46100 Burjasot, Valencia, Spain
Rafael Ibáñez
Affiliation:
Instituto de Ciencia de Materiales, Universidad de Valencia, P.O. 22085 46071 Valencia, Spain
Marek A. Kojdecki
Affiliation:
Instytut Matematyki i Kryptologii, Wojskowa Akademia Techniczna, 00-908 Warszawa, Poland
*
* E-mail address of corresponding author: pablo.pardo@uv.es
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Abstract

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Due to the great technological importance of the microstructure of kaolinite, characterizing its evolution during dry milling of kaolin and analyzing the microstructural information obtained from different methods were the main aims of this work. The microstructural alteration of kaolinite is evaluated by X-ray diffraction and electron microscopy methods, comparing the results obtained and analyzing the correlations between them. The Warren-Averbach and Voigt-function methods of X-ray diffraction microstructural analysis have been applied successfully to the study of the effects of two different, vibrating-cup dry-milling configurations in the microstructure of kaolinite from the reflections corresponding to (001) diffracting planes. The crystallite-size estimates obtained from the two methods correlate well. Field emission scanning electron microscopy measurements of kaolinite particle thickness are in good agreement with the crystallite size estimated by the two methods. The Warren-Averbach method also provided estimates of the contribution to line broadening. Vibrating-cup milling has been proved to be a more efficient method of strain comminution of kaolinites than other milling techniques, reaching extensive microstructural degradation within seconds.

Keywords

Crystallite SizeElectron MicroscopyKaoliniteLine BroadeningMechanical TreatmentStrainX-ray Diffraction
Type
Article
Information
Clays and Clay Minerals , Volume 57 , Issue 1 , February 2009 , pp. 25 - 34
Copyright
Copyright © The Clay Minerals Society 2009

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