1. Shi changxu Innovation Center for Advanced Materials,Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2. School of Materials Science and Engineering,Northeastern University,Shenyang 110819, China
Compared with the traditional ceramic preparation technology, the stereolithography 3D printing technology has the advantages of high molding accuracy, short production cycle and low cost, which provides a reliable forming process for the preparation of complex structural ceramic components. The key to high-performance ceramic core via the stereolithography 3D printing lies in the prepare ceramic slurry with high solid loading, low viscosity and uniform stability. The addition of small size ceramic particles can improve the performance of ceramic components, but it also causes the poor dispersion, high viscosity and insufficient curing depth of the slurry. To solve these problems, the most effective method is to add dispersant in ceramic slurry, utilizing steric hindrance and electrostatic repulsion mechanism of dispersant, the incompatibility between oxide ceramic particles and oily photosensitive resin can be alleviated, the repulsion between ceramic particles can be increased, and the agglomeration between ceramic particles can be reduced, so as to realize the preparation of ceramic slurry with low viscosity, high solid loading and uniform stability. In this paper, the domestic and international research progress of using dispersant to improve the stereolithography 3D printing ceramic slurry status was summarized, and the selection rules of dispersants for preparation of ceramic slurry were summarized, which provided a theoretical basis for the preparation of uniform and stable 3D printing ceramic slurry with high solid loading.