Two‐Photon Polymerization of Nanocomposites for Additive Manufacturing of Transparent Magnesium Aluminate Spinel Ceramics

Transparent polycrystalline magnesium aluminate (MAS) spinel ceramics are of great interest for industry and academia due to their excellent optical and mechanical properties. However, shaping of MAS is notoriously challenging especially on the microscale requiring hazardous etching methods. Therefo...

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Bibliographic Details
Published in:Advanced science 2024-05, Vol.11 (20), p.e2307175-n/a
Main Authors: Prediger, Richard, Sriyotha, Nitipoom, Schell, Karl G., Kluck, Sebastian, Hambitzer, Leonhard, Kotz‐Helmer, Frederik
Format: Article
Language:English
Subjects:
3-D printers
additive manufacturing
Ceramics
hot isostatic pressing
Hot pressing
Injection molding
Nanocomposites
Nanoparticles
Sintering
transparent ceramics
transparent spinel
two‐photon lithography
Viscosity
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Summary:Transparent polycrystalline magnesium aluminate (MAS) spinel ceramics are of great interest for industry and academia due to their excellent optical and mechanical properties. However, shaping of MAS is notoriously challenging especially on the microscale requiring hazardous etching methods. Therefore, a photochemically curable nanocomposite is demonstrated that can be structured using high‐resolution two‐photon lithography. The printed nanocomposites are converted intro transparent MAS by subsequent debinding, sintering, and hot isostatic pressing. The resulting transparent spinel ceramics exhibit a surface roughness Sq of only 10 nm and can be shaped with minimum feature sizes of down to 13 µm. This technology will be important for the production of microstructured ceramics used for optics, photonics, or photocatalysis. Photochemically curable nanocomposites allow high‐resolution 3D printing of transparent magnesium aluminate ceramics using two‐photon lithography. After 3D printing, the nanocomposites are thermally debinded and fully densified by sintering and hot isostatic pressing. This allows the fabrication of complex structured transparent magnesium aluminate spinel  ceramics that are difficult to access by conventional methods.
ISSN:2198-3844
2198-3844
DOI:10.1002/advs.202307175