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Investigations on the Processing of Ceramic Filled Inks for 3D InkJet Printing

1
Laboratory for Materials Processing, University of Freiburg, D-79110 Freiburg, Germany
2
Institute for Applied Materials, Karlsruhe Institute of Technology, D-76344 Eggenstein-Leopoldshafen, Germany
*
Author to whom correspondence should be addressed.
Materials 2020, 13(11), 2587; https://doi.org/10.3390/ma13112587
Received: 14 April 2020 / Revised: 25 May 2020 / Accepted: 1 June 2020 / Published: 5 June 2020
3D inkjet printing is moving from a technology of rapid prototyping to rapid manufacturing. The introduction of ultraviolet curable composites filled with functional ceramics could expand the possibilities of this technology. In this work, a simple and scalable process was investigated as a template for the production of inkjet printable functional ceramics. Pyrogenic alumina particles with an average size of 13 nm, 35 nm and 100 nm were used as fillers in an acrylate mixture. The physical coating of the ceramics with 2-[2-(2-methoxyethoxy)ethoxy] acetic acid results in a low-viscosity dispersion with a ceramic content of up to 2 vol%, Newtonian behavior and surface tension within the limits allowed for inkjet printing. The material has sufficient stability for printing tensile specimens. Tensile tests have shown that modulus of elasticity, tensile strength and toughness can be kept constant despite the light scatter caused by the particles. The final production steps could be reduced to grinding and drying of the powders, their resuspension in the organic matrix and inkjet printing. The process can be used in an industrial-scale production of materials for abrasion-resistant components with adapted tribology. View Full-Text
Keywords: composites; photopolymers; 3D inkjet printing; ceramic inks composites; photopolymers; 3D inkjet printing; ceramic inks
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Graf, D.; Qazzazie, A.; Hanemann, T. Investigations on the Processing of Ceramic Filled Inks for 3D InkJet Printing. Materials 2020, 13, 2587.

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