Effect of the green porous texture on porcelain tile properties |
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| Affiliation: | 1. Federal Institute of Education, Science and Technology of Santa Catarina (IFSC), Campus Criciúma, 88813-600 Criciúma, SC, Brazil;2. Federal Institute of Education, Science and Technology of Rio Grande do Sul (IFRS), Campus Feliz, 95770-000 Feliz, RS, Brazil;3. Graduate Program in Materials Science and Engineering (PGMAT), Department of Chemical Engineering (EQA), Federal University of Santa Catarina (UFSC), 88040-900 Florianópolis, SC, Brazil;1. Graduate Program in Materials Science and Engineering (PGMAT), Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil;2. Federal Institute of Education, Science and Technology of Santa Catarina (IFSC), Campus Criciúma, SC, Brazil;3. Institute of Ceramic Technology (ITC), University Jaume I (UJI), Campus Riu Sec, Castellón, Spain;4. Ghent University, Mechanics of Materials and Structures, Tech Lane Ghent Science Park – Campus A, Technologiepark-Zwijnaarde 903, Zwijnaarde, 9052 Ghent, Belgium;5. Department of Materials Engineering (DEMa), Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil;1. CNR-ISTEC, National Research Council, Institute of Science and Technology for Ceramics, Via Granarolo, 64-48018, Faenza, Italy;2. Physics and Earth Sciences Department, University of Ferrara, Via Saragat, 1-44122, Ferrara, Italy;1. College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China;2. Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan;1. Applied Inorganic Chemistry Laboratory, Department of Inorganic Chemistry, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon;2. Local Material Promotion Authority, P.O. Box 2396, Yaoundé, Cameroon;3. Building Eco-material Laboratory, International Institute for Water and Environmental Engineering, 01 P.O. Box 594, Ouagadougou, Burkina Faso;1. LaRC, Laboratório de Revestimentos Cerâmicos, Departamento de Engenharia de Materiais, Universidade Federal de São Carlos, São Carlos, SP, Brazil;2. CRC, Centro de Revestimentos Cerâmicos, São Carlos, SP, Brazil;3. CNR-ISTEC, Istituto di Scienza e Tecnologia dei Materiali Ceramici, Faenza, Italy |
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| Abstract: | Porcelain tile is a product characterised by low water absorption (usually less than 0.1%) and excellent mechanical properties. To enhance tile aesthetic qualities, much of the porcelain tile production is polished to provide a high-gloss surface finish, in which certain closed pores in the tile body become visible. This apparent porosity of the polished tile, which had been closed porosity before polishing, sometimes lowers the product's stain resistance.Test pieces were formed from a porcelain tile composition prepared under different milling conditions, pressing variables being kept constant, and the pore size distribution of these pieces was determined. The effect of the porous texture of the green pieces on the evolution of porosity during sintering and on the residual porosity of the densified body was analysed. It was verified that the porous texture of the fired piece was conditioned by the porosity and size of the largest pores in the green piece. The effect of residual porosity on stain resistance was determined by two cleaning methods. The presence of large pores in the green body, stemming from insufficient milling of the raw materials mixture, led to tiles with greater residual porosity and worse stain resistance. |
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