|
authors |
Carneiro, J; Tobaldi, DM; Capela, MN; Seabra, MP; Labrincha, JA |
|
nationality |
International |
|
journal |
MATERIALS |
|
author keywords |
granite sludge; electroplating sludge; marble sludge; pigments; waste valorization |
|
keywords |
OPTICAL-PROPERTIES; RED MUD |
|
abstract |
The use of wastes, some of them hazards, as raw materials of ceramic pigments has been a way to diminish their environmental impact, to economically valorize them, and to face the depletion of virgin raw materials. In this work were prepared pigments having in their composition only industrial wastes: Cr/Ni electroplating (ES), and sludges from the cutting of natural stones-marble (MS) and granite (GS). The prepared mixtures were calcined at three temperatures (1100, 1200, and 1300 degrees C) and the obtained powders were characterized by XRD and UV-vis. Their coloring strength and thermal stability were assessed by adding them to different ceramic substrates: glazes (transparent bright and opaque matte) and a stoneware paste. The CIEL*a*b* coordinates of the fired materials were measured. The developed pigments are thermally stable and exhibit good tinting power, originating nicely colored and defect-free ceramic materials. |
|
publisher |
MDPI |
|
year published |
2019 |
|
volume |
12 |
|
issue |
20 |
|
digital object identifier (doi) |
10.3390/ma12203396 |
|
web of science category |
Materials Science, Multidisciplinary |
|
subject category |
Materials Science |
|
unique article identifier |
WOS:000498402100119
|
