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Recycling of waste flat glass in the fabrication of Si 3 N 4 powder by the carbo‐thermal reduction and nitridation
Author(s) -
Topateş Gülsüm
Publication year - 2019
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13442
Subject(s) - materials science , glass recycling , soda lime glass , fabrication , soda lime , flat glass , thermal , phase (matter) , borosilicate glass , composite material , raw material , lime , glass fiber , glass production , chemical engineering , waste management , metallurgy , medicine , chemistry , alternative medicine , physics , organic chemistry , pathology , meteorology , engineering
The recycle rate of waste flat glass is quite low in spite of higher SiO 2 content and its pre‐melted characteristic. This study searched a novel approach for the fabrication of Si 3 N 4 powder by carbo‐thermal reduction and nitridation from waste glass. For comparison, starting powder mixtures were prepared from silica and waste SLS (soda‐lime‐silica) glass. Carbo‐thermal reduction and nitridation process was conducted using two temperatures and different atmospheres. The results showed that equiaxed, micron size β‐Si 3 N 4 particle could be synthesized from waste glass. The use of waste glass reduced the amount of fiber‐like Si 3 N 4 particles and SiC phase by increasing the amount of the liquid phase formed. This study proved the utilization of waste flat glass as a low cost and environment friendly SiO 2 source.