Ceramic/Resin Composite Powders with Uniform Resin Layer Synthesized from SiO2 Spheres for 3D Technology

Ceramic/resin composite powders used for 3D printing are synthesized by micro-sized SiO 2 dense spheres through a simple method, and their consolidation and sintering performances are fully characterized.The results show that the viscosity of coating media decreases gradually with the increasing temperature or decreasing the resin content and the most suitable resin content is 27wt%.The uniformly coated ceramic/resin composite spheres with well dispersity, fine fluidity (25 (s/50 g)) and larger packing density (45.0%) are successfully synthesized.The spherical shape of ceramic powders is revealed to be the vital factor for the achievement of uniform coating layers, because of the interconnected packed pores and the uniform cohesive energy of spheres.Meanwhile, the thickness (1.13.7 μm) of coating layer is controlled precisely through changing the pressure during the filtration process.Moreover, the synthesized powders show well consolidation performance for the favorite necks among spheres.After sintered at 1250 ℃, the ceramics with compressive strength of 10.2 MPa and bending strength of 2.7 MPa are obtained while the shrinkage is only 5%, which indicates the composite spheres have an advantage in improving the precision of 3D technology.