FORMATION AND COLOUR PROPERTIES OF VANADIUM DOPED ZrSiO4 CERAMIC PIGMENTS

• Published in: Journal of Ceramic Processing Research Vol. 12; no. 3; pp. 279 - 288
• Main Authors: Pyon, K-R, Han, K-S, Lee, B-H
• Format: Journal Article
• Language: English
• Published: 세라믹연구소 2011
• Subjects: Ceramics; Color; Colour; Pigments; Raman spectroscopy; Synthesis; Vanadium; Zircon; 재료공학
• ISSN: 1229-9162; 2672-152X

Vanadium-doped zircon pigments were prepared by a ceramic method from a mixture of monoclinic zirconia and silica with sodium fluoride as a mineraliser and the colour of the pigments was investigated. The raw composition was varied in order to optimise the synthesis of the final pigments. The colour of pigments observed in the absence and presence of NaF was green and blue, respectively. They were characterised by XRD and UV-Vis and Raman spectroscopies. The colour changes produced in the samples during heating are discussed in terms of the valence of the vanadium species in the zircon matrix and the yield of the zircon phase. In these zircon pigments, evidence of the intermediate phase (NaVO3) in an initial step in the synthesis process was observed by Raman spectroscopy. V+4-ZrSiO4 pigments using rice husk ash give rise to a blue colouration at a low temperature (750 C) and they became a more intense blue colour with holding time and a suitable turquoise blue at high temperature (about 1300 C) glazes for porcelain wares.