Blue cobalt doped-hibonite pigments prepared from industrial sludges: Formulation and characterization

resumo

The structural stability of the pigment was investigated using X-ray diffraction coupled with SEM and UV-vis-IR analysis, as a function of the relative Co content and calcination temperature. A standard formulation prepared from commercial reagents was also prepared and characterized for the sake of comparison. The pigment was added to a transparent glaze and to a porcelain stoneware body. Since the relative amount of cobalt was low and the sintering temperature of the pigment was not too high (13501400 degrees C), the new pigment system offers an interesting alternative to spinel, olivine and willemite commercial blue pigments. Moreover, the use of several wastes in the pigment formulation does not diminish its colouring performance. (C) 2008 Elsevier Ltd. All rights reserved.

palavras-chave

CERAMIC PIGMENTS; CALCIUM HEXALUMINATE; CRYSTAL-CHEMISTRY

categoria

Chemistry; Engineering; Materials Science

autores

Leite, A; Costa, G; Hajjaji, W; Ribeiro, MJ; Seabra, MP; Labrincha, JA

nossos autores

Partilhe este projeto

Publicações similares

Usamos cookies para atividades de marketing e para lhe oferecer uma melhor experiência de navegação. Ao clicar em “Aceitar Cookies” você concorda com nossa política de cookies. Leia sobre como usamos cookies clicando em "Política de Privacidade e Cookies".