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Effect of Temperature on Decomposition of Magnesium Bicarbonate
LiYan; WangXiaojun; WuBin; TangHongjian; XieYuyu
Conference Name3rd International Conference on Applied Mechanics, Materials and Manufacturing (ICAMMM 2013)
Conference DateAUG 24-25, 2013
Conference PlaceDalian, PEOPLES R CHINA

The composition of basic magnesium carbonate varies, mainly due to the decomposition conditions of magnesium bicarbonate. In the present study, we researched the specific composition of samples prepared at different decomposition temperatures of magnesium bicarbonate. Combining XRD, TG-DSC and wet chemical analysis, we found that single component which the formula is MgCO3 center dot 3H(2)O can be got at room temperature (30 degrees C). Content of MgCO3 center dot 3H(2)O in the decomposition products decreases with the increase of decomposition temperature. The decomposition products obtained at 90 degrees C is 4MgCO(3)center dot Mg(OH)(2)center dot 4H(2)O based and contain a little MgO, Mg(OH)(2), trace amount MgCO3 center dot 3H(2)O and 4MgCO(3)center dot Mg(OH)(2)center dot 5H(2)O. Further study show that content of MgCO3 center dot 3H(2)O influences the density of final product of magnesium oxide. Density of magnesium oxide got by calcining MgCO3 center dot 3H(2)O is 0.944 g.ml(-1), and density of magnesium oxide got by calcining product that was prepared at 90 degrees C is 0.078 g.ml(-1).

KeywordMagnesium Bicarbonate Temperature Decomposition Products Chemical Composition
Document Type会议论文
AffiliationChinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Xinjiang, Peoples R China;Xinjiang Tiachen Co Ltd, Shihezi 83200, Xinjiang, Peoples R China
Recommended Citation
GB/T 7714
LiYan,WangXiaojun,WuBin,et al. Effect of Temperature on Decomposition of Magnesium Bicarbonate[C],2013:488-492.
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