Papers by Author: A. Moreno

Abstract: The aesthetic characteristics and mechanical properties of a new raw glaze of the matt type, developed for porcelain tiles, referenced SG, were determined and compared with those of a commercial matt glaze for porcelain tiles, referenced RG. Glaze SG was formulated by introducing boron as calcined borate E4972 [1]. In contrast, glaze RG contained a frit (30%) that included boron among its constituents. Despite the different chemical and mineralogical characteristics of these glazes, their chemical and mechanical properties, as well as their aesthetic characteristics, were appropriate. The dissolution of crystalline particles and the crystallisation and sintering phenomena in glaze SG were studied. The effective viscositytemperature curve of this glaze was experimentally obtained by hot stage microscopy (HSM). A model describing the effective viscosity of a glaze, based on Kriegers equation for concentrated colloidal suspensions, was developed in this study. The agreement between the experimental data and the calculated values was quite good.