Influence of different dispersants on the stability and sintering performance of ceramic slurries for DLP additive manufacturing

This study systematically explored the effects of three dispersants on the stability of high solid content ceramic slurries, their printing performance and the properties of the ceramic parts obtained from them. The results show that although KH-570 can achieve a relatively low apparent viscosity of ceramic slurry through chemical bonding, its stability is poor and the sedimentation behavior is unfavorable for long term storage. BYK-110 significantly improves the stability of the slurry with its steric hindrance effect. It still maintains excellent dispersion at a solid content of 72 wt%, and the flexural strength of the sintered ceramic reaches 14.25 ± 0.39 MPa (1400°C), which is much higher than that provided by the KH-570 system at 5.60 ± 0.56 MPa (1400°C).