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Presidente de Sessão: Antonio Pedro N. Oliveira/UFSC
Palestra 06
Characterization of ceramic bodies through optical techniques: firing behaviour, state of tension and green mechanical properties
Daniele Rebecchi (Labcontrol)
http://www.labcontrol.com.br/index.html
Abstract:
The optical techniques shown in this work allow to characterize the ceramic bodies from different points of view. The measurement of thermo-mechanical properties is performed without any contact, so the sample is completely free from constraints. This enables the possibility to measure the true change in size or volume of a material during a firing process. Optical dilatometry allows to design body formulation and firing cycle that give the best results. Optical fleximeter measurements are particularly meaningful for glazed tiles, since this method permits to study the state of tension established between glaze and ceramic body after the firing process. Due to the recent interest for larger size tiles with reduced thickness and their glazing, mechanical properties of green tiles take on great technological importance. The method presented here tackles the problem of breaking of single-firing tiles during the glazing process. This problem has always been faced considering the green flexural strength, as the highest stress experienced within the tile at its moment of rupture. This work outlines the importance to study the elastic and plastic components of deflection, during cyclic load application on green tiles, as simulation of rotary tile glazing and decorating machines.
Palestra dia 06/11 das 10:30h às 11:00h sala 1
