A practical technique for the fabrication of highly ordered macroporous structures of inorganic oxides
- National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan)
Well-defined macroporous ceramics consisting of SiO{sub 2}, TiO{sub 2} and ZrO{sub 2} have been fabricated via a template-assisted colloidal processing technique. Close-packed polymer spheres were first prepared as a template using centrifugation or gravitational sedimentation, followed by infiltration with alkoxide precursors. The centrifugation should be preferred because it is a less time-consuming process and the materials are better ordered. The removal of the template beads was achieved by calcination of the organic-inorganic hybrids at appropriate temperatures, yielding well-ordered macroporous ceramics. The arrangement of the porous structures could be changing the preparation of the packed polymer templates. Some novel arrangements of macropores were obtained in these macroporous ceramics: a simple square-packed arrangement for SiO{sub 2}, the coexistence of hexagonal close-packed and simple close-packed arrangements for TiO{sub 2}, and face-centered cubic packed arrangement for ZrO{sub 2}. The resulting highly structured ceramics could have applications in areas ranging from quantum electronics to photocatalysis and battery materials.
- OSTI ID:
- 20891617
- Journal Information:
- Materials Research Bulletin, Vol. 41, Issue 2; Other Information: DOI: 10.1016/j.materresbull.2005.08.021; PII: S0025-5408(05)00326-0; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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