Synthesis of Red Pigment by Solution Combustion Method

In this study, a new red pigment with good thermal and chemical resistance has been synthesized by solution combustion method. By substituting choromium ions in aluminium ion sites in YAlO3 perovskite structure and synthesis the YAl1-yCryO3 (y=0.01-0.1) solid solution, can provide red color. In the first step, effect of various mineralizers on YAlO3 formation has been investigated. Then effect of the doped choromium amount on the pigment color was studied. Latter, thermal stability and chemical resistance of synthesized pigment were investigated. Results showed that the most appropriate mineralizer system for the formation of YAlO3 perovskite was NaF:MgF2:Li2CO3 (3:2:1 by weight). Calcination at 1400ºC for 4 hr is the best condition for preparation of pigments with suitable color. The highest redness (a*) has been obtained when y was 0.03 (YAl0.97Cr0.03O3). Application of the prepared red pigment in low and high temperature glazes, demonstrated high chemical and thermal stability. J. Color Sci. Tech. 2(2008),77-85.© Institute for Colorants, Paint and Coatings.