Journal
DYES AND PIGMENTS
Volume 91, Issue 2, Pages 126-133Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2011.03.014
Keywords
Fe-Cr black pigment; Glaze; Transmission electron microscopy (TEM); Electron energy loss spectroscopy (EELS); Energy dispersive X-ray spectroscopy (EDXS); Focused ion beam (FIB)
Ask authors/readers for more resources
Black iron chromium (Fe-Cr) bearing oxide pigments are generally utilised as effective colourants in a wide variety of applications. However, in the case of their use within ZnO-containing glazes, they yield an undesirable brown colour instead of expected black colour. In order to understand the colour change in this system, we report the use of focused ion beam (FIB) sample preparation technique followed by the use of analytical transmission electron microscopy (TEM) characterisation techniques. According to the results, the formation of a reaction layer between the pigment and glaze was identified with an average composition of Zn(0.48)Fe(0.79)Cr(1.32)O(4). Additionally, the valance of Fe was determined as 3+ in the pigment grain, whereas 2+ in the reaction layer and the glaze, respectively. Therefore, it was concluded that the colour change is occurring as result of the valence variation of Fe, the formation of Zn(0.48)Fe(0.79)Cr(1.32)O(4) compound and the outward diffusion of Fe into the glaze. (C) 2011 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available