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<p>Magnesium and its alloys, pure or doped MgO and its solid solutions show an increasing interest for future applications in the field of biomaterials. In this paper, MgO nanoparticles were prepared by sol–gel route starting from magnesium acetylacetonate and 2–methoxyethanol. A complex thermal analysis was used to investigate in situ the decomposition reactions, the gaseous products evolved from the gel precursor of MgO during the thermal treatment procedure, in the temperature range of 293.2–1123.2&#xa0;K (20–850&#xa0;°C), and crystallization of cubic MgO phase. We found 5 steps for the pyrolysis of the precursor gel and, as gaseous products removed: water, carbon dioxide and fragments of acetylacetone and 2–methoxyethanol. The structure and morphology of the resulting MgO powder were also investigated by X–ray diffraction, scanning electron microscopy and Raman spectroscopy. The results of these analyses demonstrated that as–prepared MgO powder show a microstructure consisting of particles with rounded shape and size ranging from 7 to 12&#xa0;nm and, a structure of cubic phase by heating the gel precursor at 773.2&#xa0;K (500&#xa0;°C), 1&#xa0;h in 5%H<sub>2</sub>/Ar.</p>

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Experimental study on thermal evolution from precursor gel to crystallized MgO for biomedical applications

  • 期刊论文

  • 发表日期：

    2025年1月15日

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  • Marwa Hattab,
  • Ovidiu Cristian Oprea,
  • Marin Cernea

摘要

Magnesium and its alloys, pure or doped MgO and its solid solutions show an increasing interest for future applications in the field of biomaterials. In this paper, MgO nanoparticles were prepared by sol–gel route starting from magnesium acetylacetonate and 2–methoxyethanol. A complex thermal analysis was used to investigate in situ the decomposition reactions, the gaseous products evolved from the gel precursor of MgO during the thermal treatment procedure, in the temperature range of 293.2–1123.2 K (20–850 °C), and crystallization of cubic MgO phase. We found 5 steps for the pyrolysis of the precursor gel and, as gaseous products removed: water, carbon dioxide and fragments of acetylacetone and 2–methoxyethanol. The structure and morphology of the resulting MgO powder were also investigated by X–ray diffraction, scanning electron microscopy and Raman spectroscopy. The results of these analyses demonstrated that as–prepared MgO powder show a microstructure consisting of particles with rounded shape and size ranging from 7 to 12 nm and, a structure of cubic phase by heating the gel precursor at 773.2 K (500 °C), 1 h in 5%H2/Ar.