Artículos de revistas
Caracterização de materiais cerâmicos à base de CuCr2O4 preparados pelo método da reação de combustão em solução para uso como pigmentos
Fecha
2018-01-01Registro en:
Ceramica, v. 64, n. 369, p. 49-56, 2018.
1678-4553
0366-6913
10.1590/0366-69132018643692183
S0366-69132018000100049
2-s2.0-85041928146
S0366-69132018000100049.pdf
Autor
PPGEM
PPGQ
IFMA
UFMA
Universidade Estadual Paulista (Unesp)
Institución
Resumen
CuCr2O4-based ceramic pigments were prepared by the method of solution combustion synthesis starting at calcination in the range of 500 to 1100 °C, aiming to the application as ceramic pigment. The structural, morphological, chemical and optical properties of the material were studied using the techniques of X-ray diffraction, Rietveld refinement, field emission gun scanning electron microscopy, X-ray fluorescence, diffuse reflectance and L*, a*, b* colorimetric coordinates based on the CIE-L*a*b* method. The synthesized powders were mixed with matte and transparent glazes and applied in ceramic matrices. The results indicated that an increase in temperature led to the conversion of the chromite phase, in which regular polyhedra were observed, to delafossite, presenting a hexagonal platelike morphology. Diffuse reflectance revealed the formation of dark colored powders, confirmed by the colorimetric data. The synthesized powders exhibited green pigmenting ability when mixed into the ceramic glazes.