RESUMO
The purpose of this study is to investigate and analyze new concentric-zonal color effects in polyphase ceramic samples, particularly in a ceramic sample obtained from coal ash in the Ekibastuz coal basin. The study aims to explore the nature and characteristics of these color bands through x-ray fluorescence analysis, and provide a qualitative and quantitative analysis of the obtained x-ray fluorescence spectra. This paper presents the results of the study of new volume-surface concentric-zonal color effects in polyphase ceramic samples. Concentric-zonal color bands on the cross-sectional surface of a ceramic cylindrical sample were investigated by using x-ray fluorescence analysis. The experimental work was carried out at the laboratory of the Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague. A comparative qualitative and quantitative analysis of the obtained x-ray fluorescence spectra was carried out.
