Fabrication of Dense Silica Ceramics through a Stereo Lithography-Based Additive Manufacturing

Abstract:

Silica ceramics were fabricated via an additive manufacturing process based on stereolithography. Ceramic suspension with low viscosity and high solid loading is of importance to stereolithography based UV-curable. In this work, to meet the requirements of stereolithography, effects of temperature, additive content and ball-milling time on the viscosity of silica slurry were investigated, and properties of silica ceramics sintered at different temperature were also researched.The results show that increasing temperatures strongly decrease the viscosity unless when the temperature is above 70°C. The minimum of viscosity was observed for an appropriate addition of dispersant, which is corresponding to the best dispersion state of silica particles in the photopolymerizable monomer. And optimizing ball-milling time showed the lowest viscosity suitable for the stereolithography process. The appropriate temperature, additive content and ball-milling time facilitating stereolithography was 70°C, 2% and 60min respectively. The prepared ceramics sintered at 1220°C showed a density and flexural strength of 1.57g/cm³ and 13.31MPa respectively.

• Periodical: Solid State Phenomena (Volume 281)
• Pages: 456-462
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.281.456
• Online since: August 2018
• Authors: Ying Ying Wang*, Ling Li, Zai Yi Wang, Fu Tian Liu, Jia Hui Zhao, Ping Ping Zhang, Chun Lu
• Keywords: Additive Manufacturing, Mechanical Properties, Silica Ceramics

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