Study of doped Ce[O.sub.2] prepared by different synthesis

The compounds based on Ce[O.sub.2] belong to the group of high-temperature pigments. The principal of these pigments makes the host lattice of the Ce[O.sub.2], which is doped by terbium and zirconium ions, that lead to obtaining of the interesting dark orange colour. The research is focused on three different methods of synthesis. The pigments have been prepared by the classical dry proces (i.e. solid-state reaction) in the temperature range from 1,200 to 1,600[degrees]C, by the precipitation and as the last method a simulation of 'Mixer Dryer Reactor' (MDR) under laboratory conditions (two-step process) was used. The aim was to improve and optimize the synthesis conditions of studied pigments. The compounds were also evaluated from the point of view of their colour properties and structure.