Preparation of Cr-Doped YAlO3 Red Ceramic Pigment and the Coloration Mechanism

摘要

The red ceramic pigment is widely used in industrial production,but the pigments with pure color and bright red performance are rare.Therefore,it is important to study and develop new red ceramic pigment with perfect color performance.This paper reports the preparation of Cr-doped YAlO3 red ceramic pigment rendering by sol-gel method with high temperature resistance,good color and proposed color mechanism.The prepared samples were characterized by XRD,SEM,EDS and UV-vis,and the effects of Cr on the crystal structure,color rendering properties and color mechanism were discussed.The results showed that the optimum concentration of coloring agent (Cr) in Cr∶YAlO3 red ceramic pigment was 3 at.％.The main color mechanism was also discussed.Compared with the solid phase sintering and precipitation methods for the synthesis of red ceramic pigment,the sol-gel method possessed obvious advantages,such as perfect mixing of the raw materials,uniform dispersion of doping ions and the pure color.