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This study investigates the rheological behavior and printability of talc-magnesium oxide (MgO) ceramic inks formulated for extrusion-based 3D printing of magnesium silicate ceramics. Talc and MgO powders were dispersed in deionized water with sodium hexametaphosphate (SHMP) as dispersant, carboxyl methyl cellulose (CMC) as binder, and polyethyleneimine (PEI) as flocculant. Rheological tests including viscosity and three-interval thixotropy were carried out to investigate the ink characteristic and correlate with the printability. The ink composition, with 42 vol% Talc and MgO ceramic powders, 58 vol% DI water, 2 wt% SHMP, 0.2 wt% CMC, and 0.65 wt% PEI, balanced extrudability and stability, enabling 3D printing of lattice structures. No crack was observed on all the printed parts. The sintering was performed at temperature ranging from 1300 ℃ to 1400 ℃. The X-ray diffraction results confirmed the formation of magnesium silicate derivatives particularly forsterite with minor enstatite at 1300 ℃ and present of pure forsterite in the sintered parts at temperature of 1350 ℃ and 1400 ℃. This work provides critical insights into tailoring talc-MgO ceramic inks for 3D printing, advancing manufacturing of engineering ceramic components.

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Rheological and Printability Study of Talc-MgO Ceramic Ink for 3D Printing

  • 会议论文

  • 发表日期：

    2026年

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  • Zong Qi Wong,
  • Wei Hong Yeo,
  • Leong Huat Low,
  • Jing Yuen Tey,
  • Chen Hunt Ting,
  • Chui Kim Ng,
  • Ming Chian Yew,
  • Jia Huey Sim,
  • J. Purbolaksono

摘要

This study investigates the rheological behavior and printability of talc-magnesium oxide (MgO) ceramic inks formulated for extrusion-based 3D printing of magnesium silicate ceramics. Talc and MgO powders were dispersed in deionized water with sodium hexametaphosphate (SHMP) as dispersant, carboxyl methyl cellulose (CMC) as binder, and polyethyleneimine (PEI) as flocculant. Rheological tests including viscosity and three-interval thixotropy were carried out to investigate the ink characteristic and correlate with the printability. The ink composition, with 42 vol% Talc and MgO ceramic powders, 58 vol% DI water, 2 wt% SHMP, 0.2 wt% CMC, and 0.65 wt% PEI, balanced extrudability and stability, enabling 3D printing of lattice structures. No crack was observed on all the printed parts. The sintering was performed at temperature ranging from 1300 ℃ to 1400 ℃. The X-ray diffraction results confirmed the formation of magnesium silicate derivatives particularly forsterite with minor enstatite at 1300 ℃ and present of pure forsterite in the sintered parts at temperature of 1350 ℃ and 1400 ℃. This work provides critical insights into tailoring talc-MgO ceramic inks for 3D printing, advancing manufacturing of engineering ceramic components.