AI Article Synopsis
- There are concerns about the environmental impact and resource reuse of SiC sludge created when cutting silicon wafers.
- The study examined how different ratios of NaSiO solution and sodium hydroxide affect the performance of metakaolin geopolymers during geopolymerization.
- Results show that using 10% SiC sludge with a 1.6 ratio of NaSiO to sodium hydroxide can produce a viable geopolymer, although high NaOH content may hinder the material's mechanical strength.
Article Abstract
There are considerable resource reuse and environmental concerns regarding SiC sludge (SiCS) that results from cutting silicon ingots into wafers. In the current study, the effect of the NaSiO solution/sodium hydroxide solution (NS/SS) mass ratio and SiCS amount on metakaolin geopolymers was found during geopolymerization system performance. The results indicate that while NS/SS ratio was relatively low, increasing the NaOH content resulted in a sufficient amount of OH in the system to increase the solubility and hinder polycondensation, as indicated by the bulk density and setting-time results; since the polycondensation was inhibited, the mechanical strength was reduced. This study demonstrated that a geopolymer can be formed from a substitution of 10% SiCS and with an NS/SS ratio of 1.6, and that this geopolymer is a feasible material.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7254243 | PMC |
| http://dx.doi.org/10.3390/ma13092203 | DOI Listing |
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