High-surface-area corundum by mechanochemically induced phase transformation of boehmite

See allHide authors and affiliations

Science  25 Oct 2019:
Vol. 366, Issue 6464, pp. 485-489
DOI: 10.1126/science.aaw9377

You are currently viewing the editor's summary.

View Full Text

Log in to view the full text

Log in through your institution

Log in through your institution

Milling corundum nanoparticles

High-purity corundum (α-Al2O3) nanoparticles could enable applications such as more stable catalyst supports or precursors for high-strength ceramics. Milling of corundum only produces micrometer-scale particles, and direct synthesis from other aluminum oxides that would be likely starting materials, such as γ-Al2O3, fails because of the high activation barrier for converting the lattice structure of these cubic close-packed oxides. Amrute et al. show that ball milling of boehmite, γ-AlOOH, created ∼13-nanometer-diameter corundum nanoparticles of high purity through a mechanically induced dehydration reaction and by the effect of milling impacts on the surface energy of the particles.

Science, this issue p. 485

View Full Text

Stay Connected to Science