| Summary: | Experiment was done in 2005–2006 years in the base of Vilnius pedagogical university in Chemistry institute. The title of this experiment is „Formation peculiarity of copper aluminates“. The author of this experiment is Jurgita Rakauskaitė and the director of this experiment is doc. dr. Raimondas Giraitis. The aim of this work was to synthesize CuAlO2 and CuAl2O4 from compounds of certain copper, alunimium nitrates and sulfates, and to compare dependance of copper aluminates formation on time and temperature. Firstly, reagents were crushed into powder, pressed and heated, changing heating time and temperature. For the reseach were used these methods: microstructural analysis, differential thermal analysis (DTA), X – ray difractional (XRD) analysis and scanning electron microscopy (SEM). When all the reseaches were finished, these conclusions were made: CuAl2O4 from nitrates begins to form at 750oC and CuAl2O4 from sulfates begins its crystalisation at 700oC. When the temperature is higher than 950oC, formation of CuAlO2 begins. The higher the temperature is, the less time the copper aluminates take to form. Copper aluminates, formed from solid phase, made small crystals and formed from liquid phase made big various shape crystals.
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