Crystal structure, optical properties and colouring performance of karrooite MgTi2O5 ceramic pigments (Articolo in rivista)

Type
Label
  • Crystal structure, optical properties and colouring performance of karrooite MgTi2O5 ceramic pigments (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.jssc.2007.08.029 (literal)
Alternative label
  • Matteucci F.; Cruciani G.; Dondi M.; Gasparotto G.; Tobaldi D.M. (2007)
    Crystal structure, optical properties and colouring performance of karrooite MgTi2O5 ceramic pigments
    in Journal of solid state chemistry (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Matteucci F.; Cruciani G.; Dondi M.; Gasparotto G.; Tobaldi D.M. (literal)
Pagina inizio
  • 3196 (literal)
Pagina fine
  • 3210 (literal)
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  • 180 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 15 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • ISTEC-CNR, Institute of Science and Technology for Ceramics, Via Granarolo 64, 48018 Faenza, Italy Department of Earth Sciences, University of Ferrara, Via Saragat 1, 44100 Ferrara, Italy Department of Earth and Geo-Environmental Sciences, University of Bologna, Piazza di Porta San Donato 1, 40126 Bologna, Italy (literal)
Titolo
  • Crystal structure, optical properties and colouring performance of karrooite MgTi2O5 ceramic pigments (literal)
Abstract
  • Karrooite, MgTi2O5, is a promising ceramic pigment due to its high refractoriness and refractive indices, as well as its ability to host transition metal ions in two crystallographically distinct octahedral sites. The colouring performance was investigated combining X-ray powder diffraction with UV-vis-NIR spectroscopy on karrooite doped with V, Cr, Mn, Fe, Co or Ni (M) according to the formula Mg1-xTi2-xM2xO5, with x ¼ 0.02 and 0.05. Transition metals solubility in the karrooite lattice is not complete and a second phase is always present (geikielite or rutile). Structural data proved that incorporation of different chromophore ions into the karrooite structure affects unit cell parameters, bond length distances and angles, site occupancies and therefore cation order-disorder. Optical spectra exhibit broad absorbance bands of Co(II), Cr(IV), Fe(III), Mn(II), Mn(III), Ni(II), V(IV) with distinct contributions by cations in the M1 and M2 sites. Karrooite pigments have colours ranging from orange to brown-tan (Cr, Fe, Mn, V) to green (Co) and yellow (Ni) that are stable in low-temperature (<1050 1C) ceramic glazes and glassy coatings. (literal)
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