Preparation and characterization of macroporous α-alumina

Sergey Sokolov, David Bell, Andreas Stein

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

α-Al2O3 powders with three-dimensionally ordered or randomly positioned macropores were synthesized by templating with poly(methyl methacrylate) colloidal crystals. Aluminum nitrate was precipitated with ammonium hydroxide within the interstices of the template; calcination removed the polymer and converted the inorganic precursors into a macroporous skeleton of α-Al2O3. Subsequent calcination at higher temperatures and hot stage transmission electron microscopy experiments were performed to study sintering effects on the product morphology. These materials combine the thermal and chemical stability of corundum with a very open structure of uniform macropores that can permit facile transport of guest molecules in potential catalysis, filtration, and sensing applications.

Original languageEnglish (US)
Pages (from-to)1481-1486
Number of pages6
JournalJournal of the American Ceramic Society
Volume86
Issue number9
DOIs
StatePublished - Sep 2003

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