Influence of hydration time on the hydration of MgO in water and in a magnesium acetate solution

• Published in: Journal of thermal analysis and calorimetry Vol. 96; no. 3; pp. 987 - 992
• Main Authors: Aphane, M. E., van der Merwe, E. M., Strydom, C. A.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Dordrecht Springer Netherlands 01-06-2009; Springer
• Subjects: Acetates; Analytical Chemistry; Chemistry; Chemistry and Materials Science; Elements and non-metal compounds (oxides, hydroxides, hydrides, sulfides, carbides, ...); Exact sciences and technology; Hydration; Inorganic Chemistry; Inorganic chemistry and origins of life; Leveling; Magnesium; Magnesium carbonate; Magnesium oxide; Measurement Science and Instrumentation; Optimization; Physical Chemistry; Polymer Sciences; Preparations and properties; Surface area; calcination; TG; magnesium hydroxide; magnesium oxide; magnesium acetate; hydration; Hydration; Magnesium Hydroxides; Thermogravimetry; Magnesium Acetate; Thermal analysis; Aqueous solution; Magnesium Oxides; Calcining
• ISSN: 1388-6150; 1588-2926; 1572-8943
• DOI: 10.1007/s10973-008-9095-y

The time required for maximum hydration of MgO obtained from the calcination of magnesite was determined. The MgO samples were hydrated for different time intervals in both water and magnesium acetate. A thermogravimetric analysis (TG) method was used to determine the degree of hydration to Mg(OH)
2
. Increasing the hydration time, the degree of hydration of MgO and surface area of the formed Mg(OH)
2
increased. A leveling effect was observed on the percentage Mg(OH)
2
obtained from hydration in magnesium acetate, and an optimum amount of 85% was obtained after 500 min. For the hydration in water, the leveling effect was only observed after 800 min giving a maximum of 65% Mg(OH)
2
.