brown-tan (Fe and Mn doping) – due essentially to a selective absorption of visible light connected with crystal field
electronic transitions of chromophore ions. The lack of relevant charge transfer bands in the visible spectrum results in
a less pure and less saturated colour than that of current industrial ceramic pigments [2–5]. Furthermore, zirconium
titanate exhibits an unsatisfactory technological performance, being to a considerable extent dissolved by chemically
aggressive ceramic matrices, such as glazes for fast-fired tiles and tableware or the liquid phase formed at high
temperature in bodies for porcelain stoneware tiles. Therefore, the maximum temperature that zirconium titanate
pigments can withstand without relevant colour changes is around 1000 8C [2].