Ceramics-Silikáty 55, (1) 20 - 25 (2011) |
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SOLUTION COMBUSTION SYNTHESIS AND CHARACTERISTICS OF NANOSCALE MgO POWDERS
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Bai Jiahai, Meng Fantao, Wei Chuncheng,
Zhao Yunxia,
Tan Huihui,
Liu Juncheng
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School of Materials Science and Engineering,
Shandong University of Technology, ZiBo, 255049, P. R. China
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Keywords: MgO, Solution combustion synthesis, Nanocrystalline, Specific surface area
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Nanoscale MgO powders were fabricated via a microwave-induced solution combustion process using Mg(NO₃)₂ and starch
as starting materials. Effects of the relative fuel-to-oxidant ratios (φₑ = 1.1, 1.0, 0.9 and 0.8, respectively) on characteristics
of MgO nanoparticles were also investigated. The XRD analysis discloses that MgO nanocrystalline are successfully
synthesized and the crystalline size of MgO increases remarkably with increasing of φₑ from 0.8 to 1.1. TEM images reveal
that nanoporous agglomerates of MgO nanocrystalline are formed in the powders. Experimental results show that the
average particles’ size of the powders decreases significantly as φₑ increases from 0.8 to 1.1. However, the powders from the
precursors with φₑ equal to 1.0 exhibit larger specific surface area as compared the other powders. |
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