PREPARATION AND EVALUATION OF THE COLOR PROPERTIES OF YFeO₃ PIGMENTS DOPED BY In3+ AND Ga3+

Inorganic pigments of type YFe x (M) 1-x O 3 , where M = In or Ga and x = 1 or 0.95, were synthesized by mechanical activation in liquid medium (H 2 O + C 2 H 6 O) and successive two-step heating in the range 900 -1300C. TG-DTA analysis of a mixture of starting oxides Fe 2 O 3 and Y 2 O 3 was performed in order to compare the thermal behavior of reagents before and after mechanical activation. YFeO 3 was prepared as a standard and applied into the ceramic glaze and acrylic copolymer matrix (mass and diluted tone). Samples were characterized by XRD analysis, particle size distribution (PSD) and color measurements. The effect of substitution of 5 mol. % Fe 3+ for In 3+ or Ga 3+ on the changes of pigment properties was examined.