Flaky and Porous Rod-Like MgO Powders Prepared by Molten Salt Synthesis

Jian Qi Sun; Hao Chen; Fei Cao; Qing Hua Hu

doi:10.4028/www.scientific.net/AMR.335-336.674

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 335-336Flaky and Porous Rod-Like MgO Powders Prepared by...

Flaky and Porous Rod-Like MgO Powders Prepared by Molten Salt Synthesis

Abstract:

Flaky and porous rod-like MgO powders were prepared by molten salt synthesis with MgCl₂, CaCO₃, NaNO₃ and KNO₃ as raw materials. TG-DSC, XRD and SEM were used to investigate the reacion process and characterize the resulting products. The results indicated that Ca²⁺ was displaced by Mg²⁺ and dolomites were formed and finally converted into magnesium carbonates during the molten salt synthesis. Fibrous Mg(OH)₂ formed in PEG solution and flaky Mg(OH)₂ formed in EDTA-PEG solution illustrated that EDTA and PEG molecules could define the growth direction of Mg(OH)₂. The porous rod-like MgO powders with 20-80 nm in diameter and 40-100 in length-to-width ratio were obtained by the decomposition of fibrous Mg(OH)₂ at 600 °C, while the flaky MgO powders were prepared by the decomposition of flaky Mg(OH)₂ at 600 °C. Flaky MgO powders were platelike, with 30-50 nm in thickness, 200-500 nm in diameter, and up to 1.0 µm² in a single slice surface area.

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Periodical:

Advanced Materials Research (Volumes 335-336)

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674-677

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https://doi.org/10.4028/www.scientific.net/AMR.335-336.674

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Online since:

September 2011

Authors:

Jian Qi Sun, Hao Chen, Fei Cao, Qing Hua Hu

Keywords:

Flaky, MgO Powder, Molten Salt Synthesis, Porous Rod-Like

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