| 摘要 |
A chi (χ)-alumina dispersion and coating slurry of digital printing medium containing the same is disclosed, which includes flaked porous χ-alumina nanoparticles with high specific surface area obtained by subjecting gibbsite to thermal treating, physical wet-milling and pH adjusting processes. Since the χ-alumina nanoparticles have high ink absorptivity and low cost, they can be applied to the coating layer of the digital printing medium instead of conventional silica material.
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