Production of Titanate Microspheres by Sol-Gel and Spray-Drying

E Sizgek; John R Bartlett; M P Brungs

doi:10.1023/A:1008612415777

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Production of Titanate Microspheres by Sol-Gel and Spray-Drying

Journal article

Peer reviewed

Production of Titanate Microspheres by Sol-Gel and Spray-Drying

E Sizgek, John R Bartlett and M P Brungs

Journal of Sol-Gel Science and Technology, Vol.13(1-3), pp.1011-1016

1999

DOI: https://doi.org/10.1023/A:1008612415777

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Abstract

Materials Engineering

microspheres

sol-gel

titania

Synroc

spray-drying

Porous titanate precursor microspheres (20-60 μm in diameter), with a high sorption capacity for radioactive wastes from nuclear reprocessing plants, have been produced on a 50 kg scale by spray-drying precursor sols. Well-dispersed, stable sols were produced by hydrolyzing acetic acid modified tetraisopropyltitanate and peptizing the titania hydrolysate with acidic zirconia sol. The resulting TiO 2/ZrO 2 sols were routinely concentrated to 900 g dm -3 (oxide basis) and exhibited excellent stability. These sols were subsequently mixed with dispersible alumina powder and partially aggregated by adding calcium and barium nitrate salts. The resulting sols were spray-dried to produce microspheres with controlled porosity and morphology. The properties of the spray-dried powder were very dependent upon the chemical properties of the precursor sol. In particular, hollow spheres were produced from well-dispersed sols, whereas solid spheres could be produced from partially-aggregated sols.

Details

Title: Production of Titanate Microspheres by Sol-Gel and Spray-Drying
Authors: E Sizgek (Author) - Australian Nuclear Science and Technology Organisation Materials Division
John R Bartlett (Author) - Australian Nuclear Science and Technology Organisation Materials Division
M P Brungs (Author) - University of New South Wales
Publication details: Journal of Sol-Gel Science and Technology, Vol.13(1-3), pp.1011-1016
Publisher: Springer New York LLC
Date published: 1999
DOI: 10.1023/A:1008612415777
ISSN: 0928-0707
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99449003902621
Output Type: Journal article

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Collaboration types: Domestic collaboration
Web Of Science research areas: Materials Science, Ceramics