Synthesis of Cr-Doped Sphene Ceramic Pigments by Spray Drying

Abstract:

Ceramic pigments with Cr-doped sphene structure (CaSn1-xCrxSiO5, CaTi1-xCrxSiO5) were synthesized by both spray drying an aqueous solution of precursor salts plus further calcining the resulting powders and conventional ceramic method. The thermal evolution of products was studied by X-Ray Powder Diffraction (XRPD). The powder morphology and chemical composition were analyzed by SEM-EDX. The color efficiency of pigments was evaluated by colorimetric analysis (CIELab system). Results showed that the spray drying process decreased the maximum firing temperature and increased the color efficiency of Cr-doped sphene pigments therefore enhancing a higher reactivity of powders compared with the solid state process.

• Periodical: Advances in Science and Technology (Volume 45)
• Pages: 272-275
• DOI: https://doi.org/10.4028/www.scientific.net/AST.45.272
• Online since: October 2006
• Authors: T. Stoyanova, F. Matteucci, Anna L. Costa, M. Dondi, F.J. Carda
• Keywords: Ceramic Pigments, Color, Sphene, Spray Drying, Titanite, X-Ray Powder Diffraction

References

[1] S. Takenouchi, Mineral. Deposita, Vol. 6 (1971) p.335.

[2] R.S. Pavlov, V.B. Marzá, J.B. Carda, J. Mater. Chem. Vol. 12 (2002) p.2825.

[3] A.L. Costa, G. Cruciani, M. Dondi, F. Matteucci, Ind. Ceram., Vol. 23 (2003) p.1.

[4] E.F. Cordoncillo del Rio, J.B. Carda, M. Llusar, P. Escribano, J. Eur. Ceram. Soc., 18, (1998), 1115-1120.

[5] E. López-Navarrete, M. Ocaña, J. Eur. Ceram. Soc., Vol. 22 (2002) p.353.

[6] A. Costa, C. Galassi, E. Roncari, J. Eur. Ceram. Soc. Vol. 22 (2002) p. (2093).

[7] A.C. Larson, R.B. Von Dreele, Los Alamos Nat. Lab. Report LAUR. (2000), p.86.

[8] B.H. Toby, J. Appl. Cryst., Vol. 34 (2001), p.210. c d 20 µm SDL1 20 µm T17 20 µm SDL3 20 µm T5.

DOI: 10.7554/elife.37168.007