Abstract
Porcelain, wall/floor tiles, and roofing tiles are classified as traditional ceramics and are produced from natural raw materials such as clay, quartz, and feldspar. The raw materials are selected by the oxide content which provides the desired properties of the final product. However, impurities such as Fe2O3 and TiO2 may have a significant influence on both physical/mechanical properties and aesthetic appearance. Fe2O3, which is of particular importance, causes black maculation formation in tablewares, in which whiteness is essential. The only way to overcome the black maculation is to corrupt the Fe2O3 crystal structure and to employ Fe2+/3+ cation, making a solid solution with a host crystal (i.e. mullite-3Al2O3·2SiO2). The aim of this study is to identify the solubility limit of Fe2O3 in mullite crystals. With the scope of the study, an illite/kaolinite was utilized by adding an increasing amount of Fe2O3 (e.g. 1–2–4–6–8–10 wt%) into the recipes fired at 1300 °C for 3 h after homogenization. According to the mullite phase content, it is concluded that ~ 5 wt% of Fe2O3 could be dissolved in mullite crystal structure on the basis of the Rietveld refinement of the XRD patterns.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.