The influence of particle size on the dissolution of several materials has been widely studied. In regard to ceramic frits, no studies on this influence have been found, despite the importance of knowing the optimum particle size which allows stable suspensions to be obtained while avoiding the solubility of the cations. In this work, the influence of the particle size in the dissolution process of a zirconium white frit has been studied using five particle size distributions. The evolution of the dissolution of Ca(II), Mg(II), Zn(II), Si(IV) and B(III) has been determined. The concentration profiles obtained have been fitted to a kinetic model considering that the whole dissolution process is controlled by diffusion except at the initial instant when it is controlled by chemical reaction. The kinetic model proposed can be used to predict the frit behaviour in aqueous suspension by controlling the particle size in the milling process during industrial glaze preparation.
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