ZHENG Jiangtao 1, LU Jing 2, WANG Shengjia 1, JIN Lei 1, WANG Liu 1
(1. Shanghai Institute of Space Power-Sources, Shanghai 200245, China; 2. Southwest University, Chongqing 400715, China)
Abstract: The effects of oligomer and monomer, dispersant, photoinitiator and solid fracture of ceramic powder on rheology of ceramic paste were studied and the influences of sintering temperature on the properties of ceramic samples were evaluated. Low viscosity ceramic pastes with solid loading of 50 vol.% could be prepared, when the oligomer to monomer ratio was 1:2, together with 2.5 wt.% KH-560 dispersant and 3 wt.% TPO photoinitiator. After sintering at 1550 ℃, the ceramic sample had a relative density of 98.87%. The ZTA ceramic sample with 25 vol.% ZrO2 had optimal toughening effect, with compressive strength, fracture toughness, Vickers hardness to be 541±20 MPa, 8.78±0.33 MPa·m1/2 and 1876±36 HV 1/20. Such DLP is a promising process to rapidly print porous ceramic structures with high-precision for biomedical application and oil-water separation.
Key words: UV curing; ceramic paste; dispersion; sintering temperature; physicochemical properties