Estudo de formulações para produção de revestimento cerâmico a partir de matérias-primas do Piauí com adição de pó de vidro

Abstract

The objective of this study was to evaluate the potentiality of the ceramic masses used in the manufacture of ceramic tiles. Three formulations of ceramic masses were prepared with the following raw materials: kaolinite clay, sands, kaolin, feldspar and glass powder. The raw materials purchased are all from the state of Piauí, were characterized by theoretical density, X-ray fluorescence, X-ray diffraction, thermogravimetric analysis and scanning electron microscopy. In the ceramic mass the feldspar flux was partially and / or totally replaced by glass powder. Samples with dimensions 10x10x80mm were prepared by pressing and sintered at temperatures of 1150 ° C, 1200 ° C and 1250 ° C. The technological properties evaluated were: linear retraction, water absorption, apparent porosity, apparent specific mass and tensile strength. The best results were referred to the formulation where the feldspar was totally replaced by the glass powder with burnt specimens at a temperature of 1200 ° C, among them the mechanical strength reached a mean of 33.96 MPa and an average water absorption of 1, 42%. The ceramic coating produced had acceptable technological properties for use in floors and walls, demonstrating the potential of the use of Piauí raw materials used in the manufacture of ceramic coating