Whiteness process of tile ceramics: using a synthetic flow as a modifier agent of color firing |
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Authors: | G R dos Santos M C Pereira M Olzon-Dionysio S D de Souza M R Morelli |
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Institution: | 1. Departamento de Engenharia dos Materiais, Universidade Federal de S?o Carlos, 13565-905, S?o Carlos, SP, Brazil 2. Instituto de Ciência, Engenharia e Tecnologia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 39803-371, Teófilo Otoni, MG, Brazil 3. Departamento de Física, Universidade Federal de S?o Carlos, 13565-905, S?o Carlos, SP, Brazil
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Abstract: | Synthetic flow is proposed as a modifier agent of color firing in tile ceramic mass during the sinterization process, turning the red color firing into whiteness. Therefore, the 57Fe Mössbauer spectroscopy was used to understand how the interaction of the iron element in the mechanism of color firing mass occurs in this system. The results suggest that the change of color firing can be alternatively due to two main factors: (i) diluting the hematite content in the sample because of the use of synthetic flow and (ii) part of the hematite is converted in other uncolored crystal structures, which makes the final color firing lighter. |
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