The mechanical properties of a ceramic are the favored criteria to measure its qualities. For this purpose, we present in this article a new technique which consists in improving the mechanical properties by strengthening the structure of the ceramic with polymers. The amount of incorporated polymer, in a kaolin reference, is used as a criterion for the optimization of the mechanical properties of a hybrid refractory ceramic. The formulation of the mixture, in ceramic, optimized rests on a new methodology of mixture calculation and a mathematical multiple linear regression analysis (MLRA). In conclusion, the optimal mechanical properties were recorded for the optimized formula giving a mixture of 80% of hybrid kaolin, 20% of by-products GW1 and GW2 and 16% of polyethylene glucose (PEG) (PEG1500 and PEG6000). This result was confirmed by various physical tests such as the X-ray Diffraction (XRD) and the mechanical tests

Keywords: Mixture calculation, Multiple linear regressions, Hybrid refractory ceramic, Rates PEG1500 & PEG6000, Mechanical properties.