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- W4297915382 abstract "Our work describes an optimised procedure for granulating nanometric and fine micrometric particles by spray-drying to achieve ready-to-print α-Al2O3 powders. The study started by identifying raw materials suited for the process through complete characterisation of particles shape, size, and surface properties. Then, dispersion in diluted and concentrated water-based suspensions was achieved thanks to polyethyleneimine and the effect of gradual dispersant addition was assessed by determining ζ potential and aggregates size variation. Suspensions rheology was studied and modelled through Krieger-Dougherty equation to identify the maximum solid loading allowing sufficient feeding through the spray-dryer nozzle. Finally, optimisation of the granulation conditions was performed. The procedure has allowed to achieve size distributions with D90 < 50 μm and Hausner ratio <1.3 ensuring sufficient flowability. The granulated powders were printed and the porosity evolution of the samples after sintering was studied by mercury intrusion porosimetry and SEM analysis." @default.
- W4297915382 created "2022-10-01" @default.
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- W4297915382 date "2022-12-01" @default.
- W4297915382 modified "2023-09-27" @default.
- W4297915382 title "Tailoring α-alumina powder morphology through spray drying for cold consolidation by binder jetting" @default.
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- W4297915382 doi "https://doi.org/10.1016/j.oceram.2022.100307" @default.
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