Abstract
Vat photopolymerization is an additive manufacturing process that is used to fabricate highly accurate three-dimensional (3D) ceramics. However, with this process, it is difficult to mold powders, such as carbides and TiO2, which absorb light of a certain wavelength from the light source used. In this study, we investigated the fabrication of low conductivity Al2O3-ZrO2-TiO2 ceramics, a kind of electro-static discharge countermeasure ceramics, by digital light processing type vat photopolymerization. Slurries having a solid concentration of 35 vol%, in which Al2O3, ZrO2, and TiO2 ceramic powders were dispersed in a photocurable resin, were prepared. The influence of TiO2 concentration on the photocurability and laminate properties were investigated. The results showed that as the TiO2 concentration increased, the light irradiation energy required for molding increased. By carefully investigating the molding conditions at a laminating pitch of 25 μm, we could prepare dense and low conductivity Al2O3-ZrO2-TiO2 3D complex shape ceramics.
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