The rheological properties control of ceramic compositions shaped by extrusion is of major interest for the manufacturers to ensure the final products quality and the profitability of the process. In this context, the French Ceramic Society (SFC) and ICAR-CM2T have initiated a research study to characterise the rheological behaviour characterisations of two plastic ceramic bodies: stoneware and terracotta. The plasticizers effectiveness is evaluated from the rheological measurements, the drying monitoring and the mechanical resistance of the dry bodies and the final products. The results have demonstrated the possibility of characterising the viscoelastic behaviour of two plastic ceramic bodies. The flow point variations are linked to the water content and the plasticizers characteristics (nature, insertion rate). The use of an efficient plasticizer significantly improves the mechanical strength and the porosity reduction of the green bodies and fired specimens because of the significant reduction of the shaping water content. This study has provided new characterisation solutions for several sectors and their products developments.
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