Mechanism of porous ceramic fabrication using Second Aluminum Dross assisted by corn stalk as pore-forming agent

Huang, Kepeng; Wang, Longlong; Li, Mingke; Mi, Tongtong; Zhang, Jiale; Li, Jun; Yi, Xuemei

doi:10.1016/j.eti.2023.103195

Cited by 7 publications

(1 citation statement)

References 35 publications

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“…Typically, the production of one ton of molten aluminum from aluminum ore and secondary aluminum resources generates 15–25 kg and 80–150 kg of aluminum dross, respectively. Thus, millions of tons of dross are generated yearly, most of which are harmfully disposed of in landfills globally [ 19 , 20 ]. The accumulation of aluminum dross not only leads to resource wastage but also creates serious public safety and environmental problems.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Self-Coating Al2O3 Bonded SiAlON Porous Ceramics Using Aluminum Dross and Silicon Solid Waste under Ambient Air Atmosphere

Liu,

Wang,

Zhao

et al. 2023

Materials

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Al2O3-bonded SiAlON ceramic with self-coating was prepared using aluminum dross and silicon solid waste as starting materials under ambient air conditions. The changes in phase, microstructure, and physical properties of the ceramic with temperature were analyzed and the formation mechanism of the SiAlON phase was elucidated. The results showed that higher temperature was more suitable for the preparation of SiAlON ceramics. As the temperature increased from 1400 to 1600 °C, the main phases in the ceramic transformed from mullite, Al2O3, and SiAlON to Al2O3 and SiAlON. An Al2O3-rich layer spontaneously coated the surface of the porous ceramic as Al melted and oxidized at high temperature. The thickness of this layer decreased as the temperature increased. The presence of Al2O3-rich coating layer impeded air flow, allowing nitriding of Si and Al, and the formation of the SiAlON phase in ambient air conditions. This study not only presents a strategy to successfully recycle aluminum dross and silicon solid waste but also offers a straightforward approach to preparing SiAlON material in air atmosphere.

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Section: Introductionmentioning

confidence: 99%