The influence of Ca2+ and Zn2+ doping on the development of sustainable pigments based on GdFeO3 perovskite: From a reddish colour towards a pure black
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Otros documentos de la autoría: Fortuño-Morte, Maria; Serna-Gallén, Pablo; Beltrán Mir, Héctor; Cordoncillo, Eloisa
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The influence of Ca2+ and Zn2+ doping on the development of sustainable pigments based on GdFeO3 perovskite: From a reddish colour towards a pure blackFecha de publicación
2022-04-14Editor
ElsevierCita bibliográfica
FORTUÑO-MORTE, Maria, et al. The influence of Ca2+ and Zn2+ doping on the development of sustainable pigments based on GdFeO3 perovskite: From a reddish colour towards a pure black. Ceramics International, 2022.Tipo de documento
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Black pigments are very commonly used and arouse widespread interest in the ceramic industry. Nevertheless, these pigments contain toxic elements that are detrimental to human health. In view of this, the present work ... [+]
Black pigments are very commonly used and arouse widespread interest in the ceramic industry. Nevertheless, these pigments contain toxic elements that are detrimental to human health. In view of this, the present work is focused on the development of sustainable black pigments prepared by a coprecipitation method at 1200 °C. Samples with the nominal formula (Gd1–xCax)(Fe0.95Zn0.05)O2.975–x/2 (x = 0.00, 0.05, 0.10) showed single-phase orthorhombic perovskite. The presence of dopants played an important role in the reduction of Fe3+ to Fe2+ and caused different local distortions in the structure which explained the final black colouration of these pigments in comparison with the red GdFeO3 sample. The loss of symmetry and the increase in the number of d-d transitions of iron may explain the aforementioned changes. Co-doped pigments reached low C* values, improving on the purest black colour obtained in a commercial black ceramic pigment, which contains toxic elements. In addition to presenting good NIR solar reflectance values of up to 8%, the final colours of these pigments were also stable after their application in a commercial transparent glaze at 1080 °C that could be used for tiles. [-]
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Ceramics International, April 2022Entidad financiadora
Ministerio de Ciencia, Innovación y Universidades (Spain) | Universitat Jaume I
Código del proyecto o subvención
PID2020-116149 GB-I00 | UJI-B2019-41
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© 2022 The Authors. Published by Elsevier Ltd.
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info:eu-repo/semantics/openAccess
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