Influência da pressão de prensagem nas propriedades tecnológicas dos corpos cerâmicos produzidos com resíduos

Abstract

The quest for ceramic industries to meet the needs of consumers for high quality and low cost products leads to a frequent development of ceramic formulations. The reuse of industrial waste ceramics is one of the most viable alternatives for environmental impacts and the reduction in industrial costs to be exploited by industries at the present time. This course completion work aims to to evaluate the influence of pressing pressure on the technological properties of ceramics obtained with triaxial ceramic masses in which of the process of manufacturing sanitary ware of an industry of the State of Paraíba, João Pessoa. Compositions with residue levels ranging from 65 to 100% kaolin and feldspar from 0 to 35%. The ceramic bodies were pressed in pressures of 40, 60 and 80 MPa. The sintering of the bodies was carried out at 1200 ° C. The raw materials presented physical, chemical and minerals commonly used for white ceramics. The technological properties of water absorption - AA, apparent porosity - PA, mass apparent - MEA, linear retraction of burn - RLQ, loss of fire - PF and flexural tensile strength - TRF and it is possible to conclude that all values are within the parameters used in the white ceramic industry. After to evaluate the effects of pressing pressures it can be concluded that the values ​​of AA, PA, MEA and RLQ were lower as the pressure increased. The PF remained in average. Mechanical strength increased with increasing press pressure for samples pressed at 40 MPa and 60 MPa. Samples pressed at 80 MPa did not presented a statistically significant response.