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Effect of TiO2, SiO2 and Al2O3 on properties of sintered magnesium oxide from sea water

The process of isothermal sintering of magnesium oxide obtained from sea water (by precipitation with 80 % and 120 % of the stoichiometric quantity of the calcined dolomite and magnesium oxide p.a. (pro analysi purity grade) was examined with the addition of SiO2, Al2O3 and TiO2, at temperatures in the range 1300-1800 oC. The process was followed by determining the product density, as well as densification of the compacts. With compacts containing SiO2 or Al2O3 densification was examined in relation to the sintering temperature and quantity of the sintering aid ; with the compacts containing TiO2 densification was examined in relation to the sintering temperature and pressing pressure. Sample densification and pore removal during isothermal sintering have been shown to be a function of the exponent alpha. The specific surfaces, chemical composition and particle size distribution were determined for the magnesium oxide examined.

magnesium oxide; isothermal sintering

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