Journal of Northeastern University(Natural Science)

Journal of Northeastern University ›› 2009, Vol. 30 ›› Issue (5): 701-703+707.DOI: -

• OriginalPaper • Previous Articles     Next Articles

On the silica-coated surface of magnesium carbonate particles

Ji, Hai-Bin (1); Zu, Guo-Yin (1); Yao, Guang-Chun (1); Liu, Le-Tian (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2009-05-15 Published:2013-06-22
  • Contact: Ji, H.-B.
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Abstract: With the tetraethylorthosilicate (TEOS) used as starting material which was hydrolyzed on the surfaces of MgCO3 particles by sol-gol method, and the surfaces of MgCO3 particles were coated by the silicic acid thus formed. Then, silica films were formed on the surfaces of MgCO3 particles after heating-drying. Orthogonal tests were performed to investigate the influence of different conditions for TEOS hydrolysis on such a coating, and XRD was done to analyze the coated surfaces of MgCO3 particles. The results showed that the silica is really contained in the surface of MgCO3 particles, and the decomposition rate of coated MgCO3 particles lowers. As a result, the coated MgCO3 particles can be taken as a foaming agent to prepare foam metals.

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