Abstract
Currently, the non-lead treads of pigments in coating industry are nourishing in that European Union has categorized all lead compositions into the type of twice-born toxin. Therefore the substitution for lead chromate pigments is becoming a vital subject. Through the research and development, a few kind of new non-toxic yellow pigments with brilliant hue have been synthesized, in which Bi-Zn-O yellow pigment was claimed to be one of the most excellent. In order to optimize the synthesis process, the phase diagrams and thermodynamic dates for ZnO-Bi2O3 system have been evaluated. According to thermodynamic theory, a replaced solid solution model for ZnO-Bi2O3 system phase diagram calculation has been constructed. With the help of Thermo-Calc computer program, an integrity phase diagram for ZnO-Bi2O3 system has been obtained. In terms of phase diagram of ZnO-Bi2O3, the characteristics for synthesis powder of ZnO-Bi2O3 inorganic pigment have been explored.
