An overview of using solid wastes for pigment industry
authors Hajjaji, W; Costa, G; Zanelli, C; Ribeiro, MJ; Seabra, MP; Dondi, M; Labrincha, JA
nationality International
journal JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
author keywords Chromophore; Wastes; Ceramic pigments; Chromatic stability
keywords CERAMIC PIGMENTS; PHASE-EQUILIBRIA; DOPED TITANITE; MALAYAITE; NI; CAO-SIO2-TIO2; HIBONITE; CALCIUM; COLOR
abstract This work reports the use of wastes (Al-rich anodizing sludge, Cr/Ni galvanizing sludge, foundry sand, tionite and marble sawing mud) to formulate distinct inorganic pigment structures that were synthesized by the solid state reaction method. One of the tested formulations is a novel pigment based on hibonite (CaO center dot 6Al(2)O(3)), that was found a suitable hosting structure to accommodate cobalt or nickel chromophore ions in tetrahedral coordination, then giving strong blue or turquoise hues, respectively. The use of Cr as chromophore was tested in three distinct pigment structures: (i) red-wine Cr-CaSnSiO5 and brown Cr-CaTiSiO5; (ii) Cr-CaTiO3; (iii) and Cr-TiO2. Developed phases were determined, and the colouring mechanisms of the chromophore species were defined based on diffuse reflectance data. Then, the pigments were added to a standard transparent glaze, and the hues which developed were estimated from L*a*b* colorimetric measurements under the oxygen partial pressure in the atmosphere, to define stable workability window. (C) 2011 Elsevier Ltd. All rights reserved.
publisher ELSEVIER SCI LTD
issn 0955-2219
year published 2012
volume 32
issue 4
beginning page 753
ending page 764
digital object identifier (doi) 10.1016/j.jeurceramsoc.2011.10.018
web of science category Materials Science, Ceramics
subject category Materials Science
unique article identifier WOS:000299977500006
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