Preparation of oxide particles with ordered macropores by colloidal templating and spray pyrolysis

Journal Article · Mon Oct 04 04:00:00 EDT 2004 · Acta Materialia

DOI:https://doi.org/10.1016/j.actamat.2004.07.021· OSTI ID:20634785

Abdullah, Mikrajuddin ^[1]; Iskandar, Ferry ^[1]; Shibamoto, Shinji ^[2]; Ogi, Takashi ^[1]; Okuyama, Kikuo ^[1]

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1. Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527 (Japan)
2. Hiroshima Joint Research Center for Nanotechnology Particle Project, Japan Chemical Innovation Institute, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8530 (Japan)

Silicon dioxide, titanium dioxide, aluminium dioxide, zirconium dioxide, and yttrium dioxide particles containing macropores with ordered, hexagonal closed packing structures were produced by spray pyrolysis. A mixture of a solution of the oxide source (nitrous metal) and a colloid comprised of polystyrene latex (PSL) particles was used. The process involved initial drying at low temperature to evaporate the solvent, followed by drying at high temperature to permit the pyrolysis reaction to occur and to decompose the PSL beads. This takes place in a vertical reactor and requires around 1-2 s. This method can, in principle, be used to produce various types of oxide particles containing ordered pores. It allows easy control of the particle size, pore size and space, and the porosity of particles. Bragg reflection of the powdered material was observed under ultraviolet irradiation.

• OSTI ID: 20634785
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 17 Vol. 52; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
BRAGG REFLECTION
HCP LATTICES
NANOSTRUCTURES
POROUS MATERIALS
PYROLYSIS
SILICON OXIDES
TITANIUM OXIDES
ULTRAVIOLET RADIATION
YTTRIUM OXIDES
ZIRCONIUM OXIDES