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Photosensitive Al2O3 slurry with high solid content and low viscosity

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Abstract

Slurries with high solid content and low viscosity are highly necessary to lower the sintering shrinkage and avoid possible defects for ceramic components fabricated by vat photopolymerization technique. However, the viscosity of slurry dramatically arises with the increase of solid content, which severely affects the printing process and the quality of preformance. To solve this issue, a novel combined strategy of powder surface modification and selection of dispersant was proposed to significantly increase the solid load without too much increase in viscosity. The surface of Al2O3 particles was modified by Silane A174 to improve its wettability with resins, and then the use of KOS 110 formed steric hindrance between particles achieving good dispersion. The synergistic effect of the modifier and dispersant was realized. Al2O3 slurry with a high solid loading up to 65 vol% and low viscosity of 20.0 Pa·s at 30 s−1 was prepared for stereolithography-based DLP 3D printing, which had among the highest performance in photosensitive Al2O3 slurries.

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Data availability

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Acknowledgements

This work was supported by Shandong University-MSEA International Institute for Materials Genome Joint Innovation Center for Advanced Ceramics and the Key R & D projects in Shanxi Province (no. 2018ZDCXL-GY-09-06 and 2021ZDLGY14-06).

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Authors and Affiliations

  1. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan, 250061, China

    Xu Zhang, Jingde Zhang, Yuhang Tian, Shikang Xiao & Guifang Han

  2. Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Jinan, 250100, China

    Jingde Zhang

  3. National Engineering Research Centre of Ceramic Matrix Composite Manufacture Technology, Xi’an Golden Mountain Ceramic Composites Co., Ltd., Xi’an, 710118, China

    Jianzhang Li

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  1. Xu Zhang
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Correspondence to Guifang Han.

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Zhang, X., Zhang, J., Tian, Y. et al. Photosensitive Al2O3 slurry with high solid content and low viscosity. J. Korean Ceram. Soc. 60, 581–590 (2023). https://doi.org/10.1007/s43207-023-00286-5

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  • DOI: https://doi.org/10.1007/s43207-023-00286-5

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