Rheological study and printability investigation of titania inks for Direct Ink Writing process

Dolganov, Aleksei; Bishop, Matthew T.; Chen, George Z.; Hu, Di

Abstract

© 2021 Elsevier Ltd and Techna Group S.r.l. Titanium dioxide is widely used in numerous industries and with the newly developed titanium manufacturing technique, referred to as the Near-net-shape Electrochemical Metallisation (NEM) Process, the rapid and precise production of titanium dioxide components is highly sought-after. This manuscript presents the rheological investigation and extrudability tests of titania inks, to establish the improved production of titanium dioxide components via Direct Ink Writing. The extrudability tests indicated that despite an unfavourable increase in viscosity during the high shear rates (dilatancy peaks), the best-performing ink had a weight ratio of 1:0.8:0.1 TiO2:H2O:PEG, and the dilatancy peaks were smoothed out with the addition of 0.1 wt ratio of oleic acid to the ink, dramatically improving the quality of the product. To further improve the green bodies a new printing approach was also introduced, removing the necessity for specialised printing bed, by printing a removable support into the green body and allowing for drying without any cracks and warping.

Citation

Dolganov, A., Bishop, M. T., Chen, G. Z., & Hu, D. (2021). Rheological study and printability investigation of titania inks for Direct Ink Writing process. Ceramics International, https://doi.org/10.1016/j.ceramint.2021.01.045

• Journal Article Type: Article
• Acceptance Date: Jan 5, 2021
• Online Publication Date: Jan 11, 2021
• Publication Date: Jan 11, 2021
• Deposit Date: Jan 15, 2021
• Publicly Available Date: Jan 15, 2021
• Journal: Ceramics International
• Print ISSN: 0272-8842
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• DOI: https://doi.org/10.1016/j.ceramint.2021.01.045
• Keywords: Process Chemistry and Technology; Materials Chemistry; Electronic, Optical and Magnetic Materials; Surfaces, Coatings and Films; Ceramics and Composites
• Public URL: https://nottingham-repository.worktribe.com/output/5228774
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0272884221000663
• Additional Information: Dolganov, A., Bishop, M. T., Chen, G. Z., & Hu, D. (2021). Rheological study and printability investigation of titania inks for Direct Ink Writing process. Ceramics International. https://doi.org/10.1016/j.ceramint.2021.01.045