Processing and Application of Ceramics (May 2020)

Synthesis and application of pigments based on lanthanide orthoferrites

  • Patrícia M. Pimentel,
  • Jairo L.S. Dutra,
  • Maria S.C. Câmara,
  • Gerbeson C.B. Dantas,
  • Osmar R. Bagnato,
  • Glauber S. Godoi,
  • Rosane M.P.B. Oliveira

DOI
https://doi.org/10.2298/PAC2002161P
Journal volume & issue
Vol. 14, no. 2
pp. 161 – 167

Abstract

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In this work, we synthesized oxides with perovskite LnFeO3 type structure (where Ln = La, Pr and Nd), aiming their use as ceramic pigments. The as-synthesized powders, prepared by gelatin method, were thermally treated at 600 and 800 °C to obtain the perovskite phase. The characterization was performed using X-ray diffraction technique, followed by Rietveld refinement, scanning and transmission electron microscopy, spectroscopy in the UV-Visible region and CIE Lab colorimetry. The calcined powders were also used for fabrication of ceramic pieces to evaluate the colour when 2 wt.% of the powders was added into a transparent glaze. The pigments presented shades ranging from pale brown for the powdered samples to yellowish when applied in the glazes.

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