Phase separation of a microsized powder mixture of Si and SiC by Cu–Si alloying

Li, Jichao; Huang, Kai; Zhu, Hongmin

doi:10.1016/j.ces.2015.01.021

Cited by 20 publications

(1 citation statement)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, a variety of separation processes for recycling Si and SiC from the SKW have been reported, including hydrocyclone, 4,5 centrifugation, 6,7 phase-transfer separation, [8][9][10] electrical field, 11 thermal plasma process, 12 methods, 13 and supercritical water methods. 14 For example, Mouna et al 15 have successfully separated Si (82 wt%) and SiC (91 wt%) from the SKW followed by centrifugal, chemical cleaning, filtering, distillation, and extraction methods.…”

Section: Introductionmentioning

confidence: 99%

An efficient way of recycling silicon kerf waste for synthesis of high‐quality SiC

Jiang

Gao

Liu

et al. 2019

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

In this paper, an efficient approach of recycling and reutilizing of silicon kerf waste (SKW) to prepare high-quality silicon carbide (SiC) by carbothermic reduction method is reported. SKW used as silicon source and petroleum coke as carbon source were submitted to the induction furnace for high-temperature smelting. The effects and mechanism of smelting temperatures and time on micro morphology, crystal structure, and purity of the obtained high-quality SiC were studied by X-ray diffractometry, scanning electron microscopy (SEM), Fourier transform infrared (FTIR) as well as the Raman and photoluminescence (PL) analyses. Raman and PL analyses have verified the existence of SiC crystal types as 6H and 3C. The SEM and energy dispersive X-ray spectroscopy results show that the SiC particles size increases with the increasing smelting time and demonstrate that the iron impurity was enriched at the edges of SiC which can be easily removed by the subsequent acid leaching. The enrichment process can be accelerated by the increase of temperature. In addition, the carbothermic reduction mechanism of SKW was studied in detail. The obtained SiC powder after purification can reach 98.7% through this new method, which is of low cost, high efficiency, and environment friendly.

show abstract