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Coatings 2018, 8(5), 161; https://doi.org/10.3390/coatings8050161

Synthesis of Core-Shell MgO Alloy Nanoparticles for Steelmaking

1
Central Iron and Steel Research Institute, Beijing 100081, China
2
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
3
Beijing Key Laboratory of Special Melting and Preparation of High-End Metal Materials, Beijing 100083, China
*
Author to whom correspondence should be addressed.
Received: 4 April 2018 / Revised: 16 April 2018 / Accepted: 23 April 2018 / Published: 27 April 2018
(This article belongs to the Special Issue Surface Chemical Modification)
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Abstract

In this present study, we aimed to reduce the wetting angle of nanoparticles (NPs) in molten steel and thus, increase their utilization ratio in steel. In order to achieve this, a two-step process was used to synthesize a core-shell [email protected] NP structure for steelmaking through a dopamine polymerization process, which used an ammonium persulfate oxidant and high-temperature carbonization. The NP surface characterization was tested by scanning electron microscopy and field emission transmission electron microscopy, while the hydrodynamic NP size was measured by dynamic light scattering. The results showed that a carbon coating that had a thickness of 10 nm covered the NP surface, with the dispersion and stability of the particles in the aqueous solution having improved after the coating. The contact angle of the surface-treated NP was less than that of the uncoated NP in high-temperature molten steel and the corresponding wetting energy was smaller, which indicated improved wettability. View Full-Text
Keywords: MgO nanoparticle; dopamine polymerization; carbonization process; core shell structure; contact angle MgO nanoparticle; dopamine polymerization; carbonization process; core shell structure; contact angle
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Qu, J.; Yang, S.; Guo, H.; Li, J.; Wang, T. Synthesis of Core-Shell MgO Alloy Nanoparticles for Steelmaking. Coatings 2018, 8, 161.

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