The Effect of Glaze Addition to a Hard Porcelain Batch Formulation

The addition of a ZnO-containing glaze to a conventional hard porcelain batch formulation resulted in a eady densification of the material as well as in a considerable widening in the maturing temperature range. Since a good match between the glaze coating and the porcelain body was achieved by using the same glaze as admixture in the porcelain batch formulation, the fired articles had high crazing resistance. The dissolution of silicon compensates for the reduction in viscosity of the liquid phase with increasing temperature, resulting in a porceloin with sufficient stabilii against distortion during firing.

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