Recycling of solid wastes in the synthesis of Co-bearing calcium hexaluminate pigment
authors Hajjaji, W; Seabra, MP; Labrincha, JA
nationality International
journal DYES AND PIGMENTS
author keywords Calcium hexaluminate; Cobalt; Blue pigment; Wastes
keywords CERAMIC PIGMENTS; GLASS-CERAMICS; HIBONITE; MAGNETOPLUMBITE
abstract Cobalt doped calcium hexaluminate was firstly synthesized using pure reagents; subsequently, the pure reagents were substituted with industrial wastes, the composition of which had been characterized using X-Ray diffraction and X-Ray fluorescence namely, Al-anodising sludge replaced pure aluminium whilst marble cutting rejects and foundry sand were employed as sources of calcite and silica, respectively. As expected, cobalt doped hibonite was the major phase present in calcined powders and displayed an intense blue coloration due to the incorporation of cobalt in tetrahedral positions, as confirmed by transitions from (4)A(2)(F) to the excited (4)T(1)(F) and (4)T(1)(P) states observed from UV-Vis-NIR absorption spectra. The novel waste-derived hibonite pigment showed strong and stable colouring potential when applied in different ceramic supports. (C) 2009 Elsevier Ltd. All rights reserved.
publisher ELSEVIER SCI LTD
issn 0143-7208
year published 2009
volume 83
issue 3
beginning page 385
ending page 390
digital object identifier (doi) 10.1016/j.dyepig.2009.06.004
web of science category Chemistry, Applied; Engineering, Chemical; Materials Science, Textiles
subject category Chemistry; Engineering; Materials Science
unique article identifier WOS:000269280500018
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journal analysis (jcr 2017):
journal impact factor 3.767
5 year journal impact factor 3.572
category normalized journal impact factor percentile 87.094
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