Fabrication of SiOC ceramic with cellular structure via UV-Assisted direct ink writing

In this study, polysiloxane resin was modified at the molecular scale to make it amenable to ultraviolet-curing and suitable for direct ink writing. The characterization results regarding the rheological properties and infrared spectra demonstrated that the conversion of CC is proportional to the vi...

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Bibliographic Details
Published in:	Ceramics international Vol. 46; no. 3; pp. 3637 - 3643
Main Authors:	Wei, Lai, Li, Jing, Zhang, Shuai, Li, Bo, Liu, Yu, Wang, Feng, Dong, Shixiang
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 15-02-2020
Subjects:	Additive manufacturing Direct ink writing SiOC UV-Curing Direct ink writing Additive manufacturing SiOC UV-Curing
Online Access:	Get full text
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Summary:	In this study, polysiloxane resin was modified at the molecular scale to make it amenable to ultraviolet-curing and suitable for direct ink writing. The characterization results regarding the rheological properties and infrared spectra demonstrated that the conversion of CC is proportional to the viscosity and modulus of ink. As a result, three-dimensional cellular structures with a certain span and tailored porosity were obtained. The printed structures were then subjected to pyrolysis at temperatures higher than 1000°C to form uniform, crack-free, dense SiOC cellular ceramic structures, with ceramic yield of up to 70% and linear shrinkage as low as 25%. This technique enables the inexpensive and fast fabrication of SiOC ceramic products with relatively complex shapes.
ISSN:	0272-8842 1873-3956
DOI:	10.1016/j.ceramint.2019.10.083