Synthesis of diphosphate Mn2−xMgxP2O7 solid solutions with thortveitite structure: New pink ceramic dyes for the colouration of ceramic glazes
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Altres documents de l'autoria: Llusar, Rosa; García López, Araceli; Gargori, Carina; Galindo Llorach, Roberto; Badenes March, José Antonio; Monrós, Guillermo
Metadades
Mostra el registre complet de l'elementcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7053
comunitat-uji-handle3:10234/8639
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Títol
Synthesis of diphosphate Mn2−xMgxP2O7 solid solutions with thortveitite structure: New pink ceramic dyes for the colouration of ceramic glazesAutoria
Data de publicació
2012Editor
ElsevierISSN
0955-2219Cita bibliogràfica
Journal of the European Ceramic Society (Apr. 2012) vol. 32, no. 4, p. 765-776Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
http://www.sciencedirect.com/science/article/pii/S0955221911005747Paraules clau / Matèries
Resum
Solid solutions of Mn and Mg mixed diphosphatesMn2-xMgxP2O7 (0.2 < x < 1.5) have been prepared by calcination (1000 °C/4 h) of coprecipitate precursors and characterized for the first time (through thermal analysis, ... [+]
Solid solutions of Mn and Mg mixed diphosphatesMn2-xMgxP2O7 (0.2 < x < 1.5) have been prepared by calcination (1000 °C/4 h) of coprecipitate precursors and characterized for the first time (through thermal analysis, XRD, SEM/EDX and UV–vis-NIR techniques). Its colouring performance (CIE-L*a*b* parameters) within a ceramic glaze has been also analyzed. XRD and SEM/EDX results confirm the formation of a homogeneous and continuous β-Mn2-xMgxP2O7 solid solution having the thortveitite structure, isomorphous to β-Mn2P2O7 and β-Mg2P2O7. The diphosphates exhibit light brown or pinkish-white colours associated to Mn2+ ions in low-symmetry octahedral coordination. Interestingly, they develop intense purple (x < 1) or pink (1.0 ≤ x ≤ 1.5) colours once enamelled (5 wt.%) within a single-firing ceramic glaze, which are mainly associated to the presence of Mn3+ ions according to UV–vis-NIR spectra. Therefore, the Mn–Mg binary diphosphates could be used as new pink ceramic dyes for the colouration of conventional ceramic glazes. [-]
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