[Back]

S. Baumgartner, B. Busetti, M. Pfaffinger, J. Stampfl:
"Comparison of dynamic mask- and vector-based ceramic stereolithography";
Talk: 41st International Conference on Advanced Ceramics and Composites, Daytona Beach, FL; 01-22-2017 - 01-27-2017; in: "Proceedings of the 41st International Conference on Advanced Ceramics and Composites", Ceramic Engineering and Science Proceedings/ Wiley, Volume 38, Issue 3 (2018), ISBN: 9781119474746; Paper ID 16, 9 pages.

Additive manufacturing (AM) has developed into a promising technology allowing the parallel production of several complex parts with high resolution. Especially AM of ceramics shows great potential in the field of medical and dental applications where personalized aesthetic restorations are demanded. Accuracy is therefore a must to meet the high standards of those fields. At TU Wien we developed a special lithography based manufacturing technology where layer-by-layer a photosensitive slurry with ceramic filler is cured. To get dense ceramics the so called green body is then debinded and sintered. Two printing systems were evaluated: The first system uses a Digital Light Processing (DLP) approach, where a digital mirror device projects visible light (460nm) and triggers polymerization. A second system is based on a diode-laser with 405nm wavelength. In this case a galvanoscanner is used for structuring. The second systems enables a feature resolution down to 20µm.
The aim of this study is to compare both of this technologies for multiple ceramics such as aluminium oxide, zirconium oxide, bioglass® and tricalcium phosphate. In order to get the best accuracy, printing parameters such as laser speed, hatching style, exposure time and intensity are varied.

Stereolithography, AM, Ceramic, DLP

http://dx.doi.org/10.1002/9781119474746.ch16

http://publik.tuwien.ac.at/files/publik_263000.pdf