Journal of Inorganic Materials ›› 2019, Vol. 34 ›› Issue (9): 933-937.DOI: 10.15541/jim20180530

• RESEARCH PAPER • Previous Articles     Next Articles

Sodium Magnesium Fluoride Particles of Different Morphologies: Prepared by EDTA-assisted Hydrothermal Method

XU Yun-Qing,WANG Hai-Zeng()   

  1. School of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
  • Received:2018-11-13 Revised:2019-01-03 Published:2019-09-20 Online:2019-05-22
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  • Supported by:
    Fundamental Research Funds for the Central Universities(201964021)

Abstract:

Different morphologies of sodium magnesium fluoride particles were prepared by EDTA-assisted hydrothermal method using sodium fluoride, magnesium chloride hexahydrate as main materials and EDTA (ethylenediaminetetraacetic acid disodium salt) as auxiliary agent. Influence of solution pH, reaction temperature, time and complexing agent on the morphology and phase of the products was investigated, and the formation mechanism was discussed. Samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The results show that the EDTA not only provides sodium ions as raw material, but also forms complex with magnesium ions as a complexing agent in the reaction system. Reaction temperature, pH and complexing agent have great influences on the morphologies and phase of the products. The obtained products have microcube crystals with a smooth surface and micron-sized hollow spheres polymerized with nanoparticles. And the products have high crystallinity with crystal dimension ranging from 1 μm to 3 μm.

Key words: hydrothermal method, sodium magnesium fluoride, complexing agent, reaction mechanism

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