Investigation of NaF Mineralizer Effect on Properties of Hematite-Zircon Pigment in Sol-Gel

In the present work, in order to decrease the calcination temperature and appraisal of mineralizer effect on final color properties of Hematite-Zircon pigment, the effect of NaF on pigment properties investigated. Mineralizer with 0.2 mole content added to pigment in solution preparation stage. The products of the sol-gel reaction with and without mineralizer were calcinated in different temperature from 650 to 1200°C. The structural, morphological and color characteristics of samples were determined by XRD, SEM, FTIR, STA and CIELab spectroscopy investigations. The results indicate that decrease of heat-treatment temperature with NaF mineralizer addition, despite the fact that addition of mineralizer do not have appropriate effect on color properties of pigment. The mineralizer with increasing the particle size of hematite have a negative effect on the pigment properties.