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    CERAMIC SURFACE COATINGS IN SCULPTURAL ARCHITECTURE
    (Anadolu Univ, 2021) Mutlu, H. Serdar; Izolluoglu, Sanat Uzmani Asli
    In this study, the use of ceramics as a building and coating material and ceramic coatings used in sculptural architectures were investigated. After the industrial revolution, it has been seen that different building forms have emerged with the use of steel and glass in architectural coatings. As one of these, sculptural architectures became the symbol of cities, ceramic coatings began to be used as an alternative material in these structures. In cities that developed rapidly with the industrial revolution, various art movements, social and individual freedoms affected architecture as well as all fields of art. In this period, when the sharp boundaries between the fields of art disappeared, it was seen that different disciplines such as ceramics and sculpture were combined with architectural designs. Traditional and industrial ceramic tiles have been harmonized with architectural forms, both functionally, environmentally and aesthetically, with the collaboration of architects and artists. Thus, ceramic coatings began to be used as an alternative material other than glass and metal in sculptural structures in cities. In this study, ceramic tiles with different features used in Maat and Xinjin Zhi Museums, which were built in sculptural architectural forms with different functional features, were examined.
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    Effects of mechanical activation of colemanite (Ca2B6O11•5H2O) on its thermal transformations
    (Elsevier, 2016) Uysal, Turan; Mutlu, H. Serdar; Erdemoglu, Murat
    In this study, effects of mechanical activation on the thermal characteristics of colemanite (Ca2B6O11 center dot 5H(2)O) were examined with respect to its decrepitation behavior observed during the heating processes. Mechanical activation was achieved by milling (up to 150 min) in a planetary ball mill using tungsten carbide milling media. Crystallinity of the milled colemanite samples was determined by performing X-ray powder diffraction analysis. In this manner, milling conditions at which crystalline colemanite transforms to amorphous structure were obtained. Thermal gravimetric (TG) analyses together with differential thermal (DTA) and differential thermogravimetric (DTG) analysis were performed to determine how prolonged milling affects the thermal behavior of colemanite. It was found by examining the DTA data that intensive milling gives rise to removal of the crystal water from colemanite at low temperatures, which can be attributed to mechanical activation. DTG analysis revealed that mechanical activation decreases the rate of water removal from colemanite structure throughout the heating. It was suggested that mechanical activation eliminates the decrepitation almost completely, so that there is no need for pre-calcining operation which is generally required before manufacturing the colemanite-based high temperature materials. (C) 2016 Elsevier B.V. All rights reserved.