RHEOLOGICAL MODEL FIT FOR CERAMIC GLAZE MADE WITH CERAMIC FRIT OF DIFFERENT GRAIN SIZE

Ceramic Glazes are thin and continuous layers of glass constitution basically formed from a mixture of raw materials which is melted on the surface of a matrix. The ceramic chips appear to majority feedstock of this type coatings which exhibit chemical and physical nature of glass, insoluble and impermeable to liquids and gases. The production of enamels and quality specifications for use as ceramic tile requires the study of material properties inherent in the formulation and application of ceramic glaze, so as to achieve desired effects and characteristics in the final product. The study aimed at understanding the influence of particle size and chemical composition of the ceramic frit transparent on the rheological behavior of ceramic glaze suspensions, important parameter to ensure the quality of the production process and application of ceramic glazes. The ceramic enamel frit formulation with smaller grain size had a more viscous rheological behavior with higher yield stresses over the formulation of larger granulometry. Herschel Bulkley model was the best fit to the rheological behavior of ceramic glazes in respect of models of Bingham and Ostwald de Waele.