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Influence of the Chemical Composition of Ceramic Frits on the Kinetics of their Dissolution Process
A. Barba, J.C. Jarque, M. Orduña, M.F. Gazulla
Abstract
A study aboutof the influence of the chemical composition of frits ion the kinetics of their dissolution process has been performed, in order to haveobtain an more extensive knowledge about the solubility of different types of frits and to predict their behavior regarding to thewith regard to their dissolution process. The study has been conducted withusing four frits of the most usedfour of the frits most commonly used in the preparation of ceramic glazes: a zirconium white frit, a lead-containing boracic crystalline frit, a crystalline frit containing calcium and zinc and a sodium-containing boracic crystalline frit. The results have been fitted to a kinetic model in which the overall rate of the process is controlled by diffusion except the initial moments of the process, which are controlled by the chemical reaction. The differences inof solubility observed can be explained based onby the differences in the chemical composition of the frits. The kinetic model reproduces the experimental results using adjusting parameters that have physical meaning for the four studied frits.
Keywords
Frit solubility, glass-ceramics, kinetics, glazes,chemical durability
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