Abstract
In this study a commercial ceramic glaze composed by both olivine (magnesium iron silicate, (Mg,Fe)2SiO4) and commercial frits, rich in lead (about 30wt%), was reformulated by using secondary raw materials (CRT cone glass and municipal solid incinerator post-treatment bottom ashes before and after vitrification). The waste-based products were characterized and, compared to the standard glaze, showed better acid resistance, comparable aesthetic characteristics and slightly lower stainless resistance. Environmental benefits were obtained by saving natural raw material (olivine), by reducing lead percentage in the proposed formulations (from around 30 to 5wt%), by energy saving (for the avoided use of commercial frits) and by reducing lead content in the new compositions.
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