Firing transformations of Chilean clays for the manufacture of ceramic tile bodies |
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| Authors: | F Pardo S Meseguer MM Jordán T Sanfeliu I González |
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| Affiliation: | 1. ICEMS-DEQ, Instituto Superior Técnico, ULisboa, 1049-001 Lisboa, Portugal;2. CICEGe, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal;3. Departamento de Ciências da Terra, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal;1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;2. School of Metallurgy and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;1. Univ. Orléans, CNRS, BRGM, ISTO, UMR 7327, F-45071 Orléans, France;2. BRGM, 3 avenue Claude Guillemin, Orléans 45060, France;3. Earth and Environmental Sciences Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA;4. Andra, 1 – 7 rue Jean Monnet, Châtenay-Malabry 92298, France;1. Biochemical Processing and Biomaterial Research Laboratory, Gazi University, Teknikokullar, Ankara 06500, Turkey;2. Department of Chemistry, Faculty of Sciences, Gazi University, Teknikokullar, Ankara 06500, Turkey;3. Istanbul Technical University, Faculty of Sciences and Arts, Department of Chemistry, Maslak, Istanbul 34469, Turkey;1. Yuzuncu Y?l University, Engineering and Architecture Faculty Geological Engineering Department, 0 6580 Van, Turkey;2. Department of Mineralogy and Petrology, University of Miskolc, 3515 Miskolc-Egyetemváros, Hungary |
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| Abstract: | This contribution is focused on the study of the mineralogical changes occurring in the ceramic body after heating ceramic clays. Chile has an important local ceramic industry. Five deposits of clays with industrial applications were studied. The clays came from San Vicente de Tagua-Tagua (SVTT), Litueche (L), Las Compañías-Río Elqui (LC), La Herradura-Coquimbo (LH) and Monte Patria-Coquimbo (MP). The samples were heated to 830, 975, 1080 and 1160 °C keeping at the maximum temperature for 35 min. The bending strength of each ceramic body was determined at 1100 °C. Mineralogical analysis of the fired samples was carried out by X-ray diffraction. The SVTT contained quartz, spinel, cristobalite, microcline, albite, anorthite, hematite and enstatite; the LC clays quartz, mullite, spinel, microcline, albite, anorthite, hematite, diopside, enstatite, illite/muscovite and talc; the LH clays quartz, cristobalite, microcline, albite, anorthite, hematite, diopside, illite and augite; the MP clays quartz, cristobalite, microcline, albite, anorthite, hematite, diopside, gehlenite, enstatite and wollastonite and the L clays quartz, microcline and mullite. The persistence of illite at at least 900 °C was observed for LC and LH. SVTT and LH showed the required specifications for earthenware. The L clays were refractory clays with very low bending strength. |
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