ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 55, (1) 20 - 25 (2011)

Bai Jiahai, Meng Fantao, Wei Chuncheng, Zhao Yunxia, Tan Huihui, Liu Juncheng
School of Materials Science and Engineering, Shandong University of Technology, ZiBo, 255049, P. R. China

Keywords: MgO, Solution combustion synthesis, Nanocrystalline, Specific surface area

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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