关键词: 3D打印;氧化硅;陶瓷浆料;粘度;分散剂

Abstract: 3D printing high performance ceramic has been attracted by more and more attention and could be rapidly applied to aerospace field with the development of 3D printing technology.A ceramic slurry with low viscosity, high solid content and excellent fluidity was prepared by studying the effects of dispersant,slurry pH,particle size of silica and solid content on the viscosity and fluidity of slurry.The effects of different solid contents on the bending strength,sintered shrinkage rate,porosity and density of the SiO2ceramics were measured.The experimental results show that the density of the sintered SiO 2 ceramics is 74.32%and the sintered shrinkage rate is 0.95%at solid contents of 68vol%.

Key words: 3D printing;silica;ceramic slurry;viscosity;dispersant