Anisotropy management on microstructure and mechanical property in 3D printing of silica-based ceramic cores

Fabrication of ZTA crowns with simultaneously improved isotropy on mechanical property and surface quality by DLP

“…21 Previous works have identified that anisotropy on mechanical properties of DLP-shaped sintered zirconia and silica ceramic parts originated from the layer-by-layer deposition, so that different printing orientations resulted in various mechanical properties. 22,23 Although interlayer gaps are significantly reduced and even eliminated after sintering, anisotropic mechanical properties are still observed when ceramic parts are shaped in different printing orientations, due to the inherent multilayer microstructure. Xu and coworkers reported that anisotropy on microstructure and mechanical properties of DLP-shaped silica ceramic cores could be efficiently controlled by adjusting particle size of fused silica powders, adding nano-silica powders, or introducing alumina powders.…”

“…Xu and coworkers reported that anisotropy on microstructure and mechanical properties of DLP-shaped silica ceramic cores could be efficiently controlled by adjusting particle size of fused silica powders, adding nano-silica powders, or introducing alumina powders. 19,23,24 Despite most studies focusing on mechanical properties of ZTA composites fabricated by DLP, 7,10,11 few have explored the anisotropy on mechanical properties. During the fabricating process of ZTA allporcelain crowns by DLP, ZTA ceramic green-bodies can be prepared via layer-by-layer polymerization of photocurable Al 2 O 3 /yttria-stabilized zirconia (YSZ) suspensions.…”

“…Generally, mechanical anisotropy is the crucial issue needed to be considered during the fabrication of ceramic components by DLP 21 . Previous works have identified that anisotropy on mechanical properties of DLP‐shaped sintered zirconia and silica ceramic parts originated from the layer‐by‐layer deposition, so that different printing orientations resulted in various mechanical properties 22,23 . Although interlayer gaps are significantly reduced and even eliminated after sintering, anisotropic mechanical properties are still observed when ceramic parts are shaped in different printing orientations, due to the inherent multilayer microstructure.…”

“…Although interlayer gaps are significantly reduced and even eliminated after sintering, anisotropic mechanical properties are still observed when ceramic parts are shaped in different printing orientations, due to the inherent multilayer microstructure. Xu and coworkers reported that anisotropy on microstructure and mechanical properties of DLP‐shaped silica ceramic cores could be efficiently controlled by adjusting particle size of fused silica powders, adding nano‐silica powders, or introducing alumina powders 19,23,24 . Despite most studies focusing on mechanical properties of ZTA composites fabricated by DLP, 7,10,11 few have explored the anisotropy on mechanical properties.…”

Hot ceramic lithography of silica-based ceramic cores: The effect of process temperature on vat-photopolymierisation

“…LCD technology has quickly gained popularity, since they offer a fast and cost-efficient alternative to other VPP systems [19,20]. Although the use of DLP in ceramics AM has been widely explored in most recent literature [16,[21][22][23][24][25], no study demonstrated the feasibility of printing a commercial ceramic core with more complex design features using mainstream commercial LCD screen-based printers. Therefore, the main focus of this research is to offer a commercial solution to ceramic core manufacturing at scalable volume and competitive price and quality.…”