Production of Calcium Titanate from Unconventional Titanium Sources

Reference	Presenter	Authors (Institution)	Abstract
08-001	Guilherme Gralik	Gralik, G.(Instituto Federal de Educação Ciência e Tecnologia);	Thus, the he aim of the current study is to assess the achievement of theproduce calcium titanate (CT) with perovskite structure (ABO3) originated from alternative titanium sources such as rutile, ilmenite and tionite. The Ccommercial anatase (TiO2) was used as reference titanium raw material and a high purity (99%) commercial calcium carbonate (CaCO3) was used as calcium source. The raw materials were characterized through X-ray fluorescence (XRF) and X-ray diffraction (XRD). Different compositions were formulated, subsequently milled in a planetary mill for 60, 120 and 180 minutes and the mean particle size distributions were was then determined. The samples were compressed in manual press underat 150 MPa compaction pressure and sintered in resistive furnace at different temperatures from 1200 to 1400 °C for 2, 3 and to 5 hours, at the maximum temperature. The samples were analyzed through X-ray diffraction (XRD) after the sintering process and the phases were quantified according to the Rietvield method (MR). The ceramic discs were subjected to impedance spectroscopy (IS) in order to have their electrical properties determined; theand the apparent density was set throughmeasured by the Archimedes method. The images were depicted through scanning electron microscopy (SEM) in order to show the features of the formed microstructures. According to the results, the CT formation from titanium alternative sources depends on factors related to the chemical composition of the mineral sources and on parameters used in the milling and sintering phases. The electrical properties such as activation energy (Ea) and Dielectric loss (tan ?) underwent changes depending on the adopted type of alternative titanium source.
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