Rheological study and printability investigation of titania inks for direct ink writing process

Dolganov, Aleksei and Bishop, Matthew T. and Chen, George Z. and Hu, Di (2021) Rheological study and printability investigation of titania inks for direct ink writing process. Ceramics International, 47 (9). pp. 12020-12027. ISSN 02728842

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Abstract

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.

Item Type: Article
Keywords: Rheology; Titanium dioxide; Titania; Direct ink writing
Schools/Departments: University of Nottingham Ningbo China > Faculty of Science and Engineering > Department of Chemical and Environmental Engineering
Identification Number: https://doi.org/10.1016/j.ceramint.2021.01.045
Depositing User: Yu, Tiffany
Date Deposited: 07 May 2021 09:07
Last Modified: 07 May 2021 09:07
URI: http://eprints.nottingham.ac.uk/id/eprint/65183

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