Print version ISSN 0366-6913
DAL BO, M.; MELCHIADES, F. G.; BOSCHI, A. O. and HOTZA, D.. Effect of glaze and engobe properties on the curvature of ceramic tiles. Cerâmica [online]. 2012, vol.58, n.345, pp. 118-125. ISSN 0366-6913. http://dx.doi.org/10.1590/S0366-69132012000100019.
The interaction between support-glaze and support-engobe were studied separately regarding the central curvature of ceramic tiles. Were formulated two glazes samples and four engobes samples, these were applied on a particular type of ceramic support with classification in the group B-IIb, by Norma ABNT NBR 13.818/1997 - ISO 13006. Some characteristics were measured as "Thermal expansion coefficient" and "Shrinkage difference between support-engobe". A method was suggested d for evaluation of interaction between support-engobes and support-glazes. The results showed that, for interaction support-glazes the superposition of dilatometric curves method is well implemented; for interaction support-engobe, a statistical test was conducted with factorial design 22, indicating that the variable "Shrinkage difference between support-engobe" is the variable significant to describe the central curvature of ceramic tiles.
Keywords : curvature; engobe; glaze; ceramic tiles.