Effect of Silane Coupling Agent on Flow and 3D Printing Performance of Alumina Ceramic Pastes

Abstract

Abstract: In order to prevent cracks, holes, warpage and other defects in sintered ceramic parts, ceramic paste with high solid content and low viscosity is needed based on light-curing 3D printing technology. By testing the flow and curing proformances, the selection and ratio of resin monomers were optimized. KH550, KH560 and KH570 were used to modify the surface of Al₂O₃ powder to improve flow performance and stability of ceramic paste. The mechanism of silane coupling agent reducing the viscosity of Al₂O₃ ceramic paste was discussed. Al₂O₃ ceramic paste with a solid content of 75% (mass fraction) (volume fraction of 45.5%) and a viscosity of 4 540 mPa·s was obtained. An optimization method for the preparation of light-curing Al₂O₃ ceramic paste was proposed, which is expected to be helpful for the preparation of 3D printing Al₂O₃ ceramic paste with high solid content and low viscosity for complex ceramics.

Key words: light-curing technology, alumina ceramics, paste optimisation, surface modification, silane coupling agent, 3D printing performance

CLC Number:

TQ174

MIAO Xinyu, LIU Shuangyu, LU Ping, ZHANG Fulong, Vasilieva Tatiana Mikhailovna, HUANG Chuanjin, WANG Liyan, WANG Binhua. Effect of Silane Coupling Agent on Flow and 3D Printing Performance of Alumina Ceramic Pastes[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(3): 1058-1069.

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