engleski

Activated sintering of magnesium oxide from seawater with TiO2 addition

The purpose of this study was to examine the effect of the TiO2 addition in the amount of 1 mass % to magnesium oxide obtained from seawater by 80 % precipitation with dolomite lime, on the content of boron (III) oxide in sintered magnesium oxide. The combined method of rinsing of the magnesium hydroxide precipitate was used in sample preparation (3+2), i.e. rinsing by decanting was done three times by alkalised distilled water with pH of 12.50 and twice by distilled water with pH of 5.56. Rinsing on filter paper was also done using the combined method (2+3), i.e. after the sample had been rinsed twice with alkalised distilled water, it was rinsed with fresh distilled water three times. Then activated sintering of seawater-derived MgO (80 % precipitation) samples took place at 1700 oC and 1h of soaking at the maximum temperature, with the aim of determining the properties of sintered samples (density, porosity and B2O3 content) relative to the method of rinsing the magnesium hydroxide precipitate and the effect of the TiO2 added.

substoichiometric precipitation ; magnesium oxide ; activated sintering

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