Synthesis of Cr-doped CaTiSiO5 ceramic pigments by spray drying
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Scholar |
Otros documentos de la autoría: Lyubenova, Teodora; Matteucci, Francesco; Costa, Anna Luisa; Dondi, Michele; Ocaña Jurado, Manuel; Carda Castelló, Juan Bautista
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Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
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Metadatos
Título
Synthesis of Cr-doped CaTiSiO5 ceramic pigments by spray dryingAutoría
Fecha de publicación
2009Editor
ElsevierISSN
255408Cita bibliográfica
Materials Research Bulletin, 44, 4, p. 918-924Tipo de documento
info:eu-repo/semantics/articlePalabras clave / Materias
Resumen
Cr-doped CaTiSiO5 was synthesized by spray drying and conventional ceramic method in order to assess its potential as ceramic pigment. The evolution of the phase composition with thermal treatment was investigated by ... [+]
Cr-doped CaTiSiO5 was synthesized by spray drying and conventional ceramic method in order to assess its potential as ceramic pigment. The evolution of the phase composition with thermal treatment was investigated by X-ray powder diffraction (XRPD) and thermal analyses (DTA-TGA-EGA). Powder morphology and particle size distribution were analyzed by scanning electron microscopy (SEM) and laser diffraction, respectively. The color efficiency of pigments was evaluated by optical spectroscopy (UV–vis–NIR) and colorimetric analysis (CIE Lab). Results proved that spray drying is an efficient procedure to prepare highly reactive pigment precursors. The spray-dried powders consist of hollow spherical particles with aggregate size in the 1–10 μm range, developing a brown coloration. Optical spectra reveal the occurrence of Cr(III) and Cr(IV), both responsible for the brown color of this pigment. The former occupies the octahedral site of titanite, in substitution of Ti(IV), while the latter is located at the tetrahedral site, where replaces Si(IV). [-]
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