The Analysis about Synthesis, Structure and Properties of Willemite Ceramic Pigments Obtained by a Sol-Gel Method

Abstract

This work focuses on the syntheses of willemite ceramic pigments doped with cobalt and nickel ions (Co2+, Ni2+). The pigments were prepared by the sol-gel process. The phase formation has been studied by X-ray diffraction analysis. The results showed that phase composition depends on sintering temperature, isothermal retention period as well as type of chromophore ion. The basic phase is obtained at even 900-1000°C. Color characteristics of the pigments have been measured using the Lovibond Tintometer RT 100 Color-CIELab color measurement. Better results were obtained at pigments synthesized at 1100°C. High temperature ceramic pigments representing solid solution with stable crystalline phase of Zn2SiO4 were obtained. The best pigments have been added to white faience glaze and sanitary ceramics.