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M‐Doped Al 2 TiO 5 (M=Cr, Mn, Co) Solid Solutions and their Use as Ceramic Pigments
Author(s) -
Dondi Michele,
Lyubenova Teodora Stoyanova,
Carda Juan B.,
Ocaña Manuel
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2009.03172.x
Subject(s) - dopant , materials science , rietveld refinement , octahedron , doping , solid solution , ceramic , valence (chemistry) , powder diffraction , analytical chemistry (journal) , mineralogy , crystallography , crystal structure , chemistry , metallurgy , optoelectronics , organic chemistry , chromatography
New ceramic pigments based on the tialite (Al 2 TiO 5 ) structure, doped with Co (pink), Cr (green), or Mn (brown), were prepared through the pyrolysis of aerosols followed by calcination of the obtained powders at 1400°C. The expected decomposition of Al 2 TiO 5 into a mixture of Al 2 O 3 and TiO 2 on refiring was inhibited by Cr‐doping and also by co‐doping with Mg the Mn‐ or Co‐doped samples. Microstructure and phase evolution during pigment preparation were monitored by scanning electron microscopy and XRPD. Unit cell parameters of tialite were determined by Rietveld refinement of the X‐ray diffraction patterns, revealing in all cases the formation of solid solutions where the solubility of dopants in the Al 2 TiO 5 lattice followed the trend Co