EFFECT OF THE ADDITION OF REFRACTORY CLAY IN OBTAINING TIALITE AND IN ITS PHYSICAL AND MECHANICAL PROPERTIES

Reference Presenter Authors
(Institution)
Abstract
09-004 Vitor Guilherme de Oliveira Oliveira, V.G.(Universidade Federal de Alfenas); Maestrelli, S.C.(Universidade Federal de Alfenas-campus de Poços de Caldas); Ferraço, F.(Universidade Federal de Alfenas - Campus Avançado de Poços de Caldas); Del Roveri, C.(Universidade Federal de Alfenas); Da Cruz, C.M.(Universidade Federal de Alfenas); The daily life of humankind has been developing with the insertion of new technologies in materials. A tremendous number of studies have emerged to make life more adequate and comfortable to break barriers, which still exist. The ceramic material stands out among the materials because it has attractive properties for application in industry. The refractoriness of ceramic materials ensures the market for this kind of material. A well-known ceramic is tialite (Beta-Al2TiO5), which has as precursors aluminum oxide (Al2O3) and titanium oxide (TiO2). It also has high thermal shock resistance and low wettability when in contact with molten ferrous metals, besides refractoriness. However, a thermodynamic instability hinders the of this material due to risk of decomposition in a eutectoid reaction from 750ºC to 1300ºC. In order to solve this problem, additives must be added in the mixture. Therefore, the goal of this work is to study the physical and mechanical characteristics of tialite by adding refractory clay from Pocos de Caldas-MG, Brazil. Furthermore, it has no industry-defined application and becomes an environmental liability stored in the open sky. In the study, it was investigated the influence of the aluminum oxide and titanium oxide variation on the composition in the two different sintering stages. As a result, it was realized that the physical and mechanical properties fluctuate significantly, mainly in samples with excess of titanium oxide, which was more sensitive to the parameters varied in this study. The samples with excess of aluminum oxide presented the best mechanical resistance among the compositions studied. Studies carried out allow concluding that there is a range of possibilities of studying the formation of tialite and the guarantee of its thermodynamic stability. We thank CNPQ and FAPEMIG for funding this project.
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