In situ synthesis of orange rutile ceramic pigments by non-conventional methods
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Scholar |
Otros documentos de la autoría: Gargori, Carina; Cerro Lloria, Sara; Galindo Llorach, Roberto; Monrós, Guillermo
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http://dx.doi.org/10.1016/j.ceramint.2009.06.013 |
Metadatos
Título
In situ synthesis of orange rutile ceramic pigments by non-conventional methodsFecha de publicación
2010Editor
ElsevierISSN
0272-8842Cita bibliográfica
Ceramics International, 36, 1, p. 23-31Tipo de documento
info:eu-repo/semantics/articlePalabras clave / Materias
Resumen
Different precursor-mixtures of orange Cr,Sb-TiO<sub>2</sub> ceramic pigment have been obtained by non-conventional methods (heterogeneous ammonia coprecipitation, urea homogeneous coprecipitation, PECHINI polyester ... [+]
Different precursor-mixtures of orange Cr,Sb-TiO<sub>2</sub> ceramic pigment have been obtained by non-conventional methods (heterogeneous ammonia coprecipitation, urea homogeneous coprecipitation, PECHINI polyester method and an original aqueous-organic coprecipitation method in water-diethylenglycol medium) in order to produce in situ the pigment through the ceramic body firing. The pigmenting performances of powders were appraised in two cases: (a) as ceramic pigment for glazed porcelain stoneware and (b) as ceramic inks for screen printing of porcelain stoneware. Samples were characterised by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), UV-vis-NIR spectroscopy by diffuse reflectance method, CIE-L*a*b* colour parameters, BET specific surface area and crystallite size measured by the Scherrer method. The colouring performance of raw powders obtained by non-conventional methods in glazed porcelain stoneware improves that of the ceramic samples fired at 1100 °C used as reference. TEM observations indicate nanostructured powders with pigmenting performance depending on factors such as their specific surface area (BET), the crystalline phases detected by XRD (e.g. anatase-rutile presence) and their crystallite size (Scherrer measurements). Ammonia coprecipitated samples, both in water and in water-diethylenglycol medium without surfactant addition, or modified by the addition of sodium dodecyl sulphate as surfactant, stand out by their colouring performance. © 2009 Elsevier Ltd and Techna Group S.r.l. [-]
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