SINTERING BEHAVIOUR OF MAGNESIUM OXIDE OBTAINED FROM SEAWATER DOPED WITH NANO-TiO2

  • Jelena Jakić Faculty of Chemistry and Technology, Ruđera Boškovića 35, 21000 Split, Croatia
  • Miroslav Labor Faculty of Chemistry and Technology, Ruđera Boškovića 35, 21000 Split, Croatia
  • Vanja Martinac Faculty of Chemistry and Technology, Ruđera Boškovića 35, 21000 Split, Croatia
  • Martina Perić Faculty of Chemistry and Technology, Ruđera Boškovića 35, 21000 Split, Croatia
Keywords: seawater, nano-TiO2, micro-TiO2, porosity, density

Abstract

In order to improve the properties of sintered MgO (80 % precipitation) obtained from seawater, an investigation was carried out with (0, 1, 2) w/% of nano-TiO2 and micro-TiO2 additions during sintering at a temperature of 1500 °C (1 h and 2 h). The effects of the TiO2 addition on its microstructural properties, density, porosity and chemical composition after sintering were observed. The SEM/EDS analysis confirmed the formation of a homogeneous microstructure composed mainly of periclase grains and well-distributed secondary phases. CaTiO3 and MgTiO4 are predominantly located at the inter- and intra-periclase grain boundary surfaces during cooling. The microstructure of the MgO samples with the addition of nano-TiO2 become more compact, having a positive impact on the porosity and density of the samples. The addition of 1 w/% of nTiO2 represents the optimal amount for the improvement of the properties of the MgO samples (80 % precipitation) obtained from seawater.

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Published
2021-09-30
How to Cite
1.
Jakić J, Labor M, Martinac V, Perić M. SINTERING BEHAVIOUR OF MAGNESIUM OXIDE OBTAINED FROM SEAWATER DOPED WITH NANO-TiO2. MatTech [Internet]. 2021Sep.30 [cited 2021Nov.28];55(5):629–635. Available from: https://mater-tehnol.si/index.php/MatTech/article/view/277