Development of waste-based ceramic pigments


We report the preparation of ceramic pigments using industrial wastes as primary sources. In this context, the use of Al-rich sludge generated in the wastewater treatment unit of an anodising or surface boating industrial plant, and a galvanizing sludge from the Cr/Ni plating process, will be detailed. The ceramic pigments reported here were prepared using typical solid state reactions involving the metal rich sludge. The main focus will be on the synthesis of chrome-tin orchid cassiterite (Sn,Cr)O-2 chrome-tin red malayaite Ca(CrAl)SiO5, victoria green garnet Ca3Cr2Si3O12, and chrome alumina pink/green corundum (CrAl)(2)O-3 pigments. The pigments were fully characterised and then were tested in a standard ceramic glaze after. Typical working conditions and colour development will be reported.



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Materials Science


Costa, G; Ribeiro, MJ; Trindade, T; Labrincha, JA

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