The Influences of Addition of MgCO₃ on the Properties of the Magnesia Prepared Using Magnesite

Abstract:

Micropowder MgCO₃ was added into magnesite as raw materials to prepare magnesia using a two-step calcination method. The sample magnesite was characterized use X-ray diffraction (XRD) and scanning electron microscopy (SEM). Experimental results showed that the sample insulated at 1600° C for 3 hours before and after sintering presented a linear change rate of 15.6 % in the case of without adding micropowder MgCO_3, the prepared magnesia had a bulk density of 2.31 g/cm³ and apparent porosity of 32.8 %, while MgO grain size was 3.11 μm. In the case of adding 8 % micropowder MgCO₃, the sample magnesite before and after sintering showed a linear change rate of 17.9 %. The bulk density, apparent porosity of prepared magnesia were 2.46 g/cm³ and 28.1 % respectively, while the grain size of MgO was 5.15 mm.

• Periodical: Solid State Phenomena (Volume 281)
• Pages: 230-235
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.281.230
• Online since: August 2018
• Authors: Wang Nian Zhang*, Li Wang, Ni Deng
• Keywords: Apparent Property, Bulk Density, Magnesia, MgCO₃

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