Cool and photocatalytic yellow ceramic pigments; from lead-tin to Cr doped scheelite pigments
Impacto
Scholar |
Otros documentos de la autoría: Cerro Lloria, Sara; Llusar, Mario; Gargori, Carina; Monrós, Guillermo
Metadatos
Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7053
comunitat-uji-handle3:10234/8639
comunitat-uji-handle4:
INVESTIGACIONEste recurso está restringido
https://doi.org/10.1016/j.ceramint.2018.11.150 |
Metadatos
Título
Cool and photocatalytic yellow ceramic pigments; from lead-tin to Cr doped scheelite pigmentsFecha de publicación
2019-03Editor
ElsevierISSN
0272-8842Cita bibliográfica
CERRO, S., et al. Cool and photocatalytic yellow ceramic pigments; from lead-tin to Cr doped scheelite pigments. Ceramics International, 2019, vol. 45, no 4, p. 4613-4625Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://www.sciencedirect.com/science/article/pii/S027288421833267XVersión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
The historical lead based pigments (XVII-XVIII century), the modern Ni,Sb-rutile (1939) and Pr-zircon (1961) yellow pigments as well as the novel yellow pigments based on Cr-scheelite and Mo-yttrium cerate pigments ... [+]
The historical lead based pigments (XVII-XVIII century), the modern Ni,Sb-rutile (1939) and Pr-zircon (1961) yellow pigments as well as the novel yellow pigments based on Cr-scheelite and Mo-yttrium cerate pigments were synthesized and compared as semiconductors of high NIR reflectance (cool pigments) and with photocatalytic activity. All powders are wide band gap semiconductors (Eg=2.1–3.1 eV) with high NIR reflectance, ranging from 80% for Cr-Scheelite to 86% of Naples yellow, except Ni,Sb-rutile pigment that shows 55%. The low color performance of lead based pigments in alkyd paint and lead-free glazes along with its toxicity, discard these pigments as cool eco-friendly pigments. The Pr-zircon, Cr-scheelite and Mo-yttrium cerate pigments exhibit high NIR reflectance (RNIR = 80–83%) and yellow coloration (b* = 57.6–45.3) but only Pr-zircon and Cr-scheelite show color stability in alkyd paint and lead free glaze applications. Regarding to results of Orange II photodegradation test, lead based and Ni,Sb-rutile pigments inhibits the photolysis of the UV irradiation, acting as protecting agents from irradiation. The Mo-cerate shows a slight photocatalytic activity (t1/2 = 301 min) and both Cr-scheelite and Pr-zircon pigments show a moderate activity (t1/2 = 198 and 184 min respectively). Looking at a possible industrial application, the leaching test shows that the fluorides released by Pr-zircon (16.8 mg/g) as well as the Cr(VI) of Cr-scheelite (6 mg/g) should be treated and controlled. The Cr-scheelite solid solution Ca(CrxW1-x)O4 is stable to x = 0.2 but its pigmenting capacity saturates at x = 0.1. [-]
Publicado en
Ceramics International, 2019, vol. 45, no 4Proyecto de investigación
Universitat Jaume I: P1.1B2015-19; Spanish MINECO: MAT2015-69443Derechos de acceso
Copyright © Elsevier B.V.
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/restrictedAccess
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/restrictedAccess
Aparece en las colecciones
- QUIO_Articles [690]