Malayaite Ceramic Pigments prepared from Industrial Wastes: Formulation and Characterization

authors	Ribeiro, A; Hajjaji, W; Seabra, MP; Labrincha, JA
editors	Rosa, LG; Margarido, F
nationality	International
journal	ADVANCED MATERIALS FORUM V, PT 1 AND 2
author keywords	Malayaite; Ceramic Pigments; Wastes
keywords	DOPED CASSITERITE; CHROMIUM; SPECTROSCOPY; LUMINESCENCE; STATE; IONS
abstract	In this work chrome-tin red malayaite pigments Ca(Cr,Sn)SiO5 were obtained from industrial wastes: a marble sawing sludge, a galvanizing sludge from the Cr/Ni process and a foundry sand. The pigments were prepared using the common solid state reaction process. The influence of Cr2O3/SnO2 ratio, calcination temperature and introduced sludges compositions, on its structural stability, was investigated by X-ray diffraction coupled with SEM/EDS. Standard formulations, obtained from commercial reagents, were also prepared and characterized for sake of comparison. CIELab colour measurements and UV-Vis spectroscopy were used to evaluate the stability (thermal and chemical) and applicability of the synthesized pigments in colouring distinct ceramic matrixes fired at high temperatures (1050 degrees C-1200 degrees C). The pigment was added (1/20 wt. ratio) to a transparent and shining lead free glaze and to a porcelain stoneware body (1/10 wt. ratio). The incorporation of three industrial wastes, in the chrome-tin red malayaite pigment, was possible without a notorious change in terms of colouring effect allowing decreasing the synthesis temperature.
publisher	TRANS TECH PUBLICATIONS LTD
issn	0255-5476
year published	2010
volume	636-637
beginning page	1371
ending page	+
digital object identifier (doi)	10.4028/www.scientific.net/MSF.636-637.1371
web of science category	Materials Science, Multidisciplinary; Materials Science, Biomaterials; Materials Science, Coatings & Films; Materials Science, Composites
subject category	Materials Science
unique article identifier	WOS:000280763200206