表面改性对光固化3D打印Al2O3陶瓷性能的影响

陶瓷粉体表面改性是一种改善陶瓷浆料流变性能的有效方法,已应用于光固化3D打印用Al2O3陶瓷浆料的制备,然而目前鲜有关于表面改性对光固化3D打印Al2O3陶瓷烧结体性能影响的研究报道.本文采用油酸对Al2O3陶瓷粉体进行表面改性处理,利用光固化3D打印技术制备Al2O3陶瓷,研究表面改性对Al2O3陶瓷浆料流变性能、固...

Effect of surface modification on performance of Al2O3 ceramics prepared by a stereolithography-based 3D printing

Surface modification of ceramic powder is an effective method to improve rheological property of ceramic suspension and has been applied in the preparation of Al2O3 ceramic suspension which is used to fabricate Al2O3 ceramic via stereolithography-based 3D printing. However, few research effort has been made to study the effect of surface modification on the properties of stereolithography-based 3D printed Al2O3 ceramic. In this paper, oleic acids are utilized to modify the Al2O3 ceramic powders, and Al2O3 ceramics are prepared by stereolithography-based 3D printing. The effects of surface modification on the rheological and curing performance of ceramic suspension and the mechanical, thermal properties and microstructure of the sintered Al2O3 ceramic are studied. The results show that 1) the viscosity of Al2O3 ceramic suspension can be reduced by surface modification process; 2) the building resolution can be improved by surface modification; 3) the bending strength, reliability and thermal conductivity of Al2O3 ceramic can be improved by surface modification due to the more uniform grain size distribution, bigger Al2O3 grains and less pores at the grain boundaries in the Al2O3 ceramics prepared by modified Al2O3 powders, compared with those prepared by unmodified Al2O3 powders.