Nanocomposite Fe2O3–SiO2 inclusion pigments from post-functionalized mesoporous silicas
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Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7053
comunitat-uji-handle3:10234/8639
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http://dx.doi.org/10.1016/j.jeurceramsoc.2009.07.018 |
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Title
Nanocomposite Fe2O3–SiO2 inclusion pigments from post-functionalized mesoporous silicasDate
2009Publisher
ElsevierISSN
9552219Bibliographic citation
Journal of the European Ceramic Society, 29, 16, p. 3319-3332Type
info:eu-repo/semantics/articleSubject
Abstract
High-surface mesoporous silicas with different pore sizes were employed for the first time as silicon precursors in the synthesis of reddish Fe2O3–SiO2 inclusion pigments. Interestingly, the size of included Fe2O3 ... [+]
High-surface mesoporous silicas with different pore sizes were employed for the first time as silicon precursors in the synthesis of reddish Fe2O3–SiO2 inclusion pigments. Interestingly, the size of included Fe2O3 nanoparticles was partially controlled through confinement effects into silica mesopores. Notably, impregnated samples showed a more homogeneous and efficient encapsulation of smaller and monodisperse hematite nanoparticles (sizes around 10–35 nm). Moreover, they resulted in an improved reddish color at 1000 °C within a ceramic glaze. The best red shade (a* ≈ 18) was associated to nanocomposite with smaller hematite nanoparticles (around 5 nm). These promising results suggest the possibility to improve the reddish coloration and thermostability of Fe2O3–SiO2 ceramic pigments through and adequate control of confinement effects into sintered mesoporous silicas. [-]
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