Vacuum-Induced Surface Freezing to Produce Monoliths of Aligned Porous Alumina

Abstract

Vacuum-induced surface freezing has been used to produce uni-directional freezing of colloidal aluminum oxide dispersions. It leads to zones of different structure within the resulting sintered monoliths that are highly similar to those known for freeze casting using a cryogen cold source. A more-or-less dense surface layer and a cellular sub-surface region… (More)
DOI: 10.3390/ma9120983

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