Inorganic sol-gel preparation of medium sized microparticles of Li2TiO3 from TiCl4 as tritium breeding material for fusion reactors

Microspheres of Li2TiO3 were fabricated by a classical, inorganic sol-gel process from commercially available TiCl4. Elaborated process consists of the following main steps: (1) dissolving of TiCl4 in concentrated aqueous HCl and addition of LiOH; (2) formation of sol emulsion in 2-ethylhexanol-1 co...

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Bibliographic Details
Published in:Journal of sol-gel science and technology 2003, Vol.26 (1-3), p.207-212
Main Authors: DEPTULA, A, OLCZAK, T, LADA, W, SARTOWSKA, B, CHMIELEWSKI, A. G, ALVANI, C, CARCONI, P. L, DI BARTOLOMEO, A, PIERDOMINICI, F, CASADIO, S
Format: Article
Language:English
Subjects:
Chemical treatment
Chemistry
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Dechlorination
Dehydration
Exact sciences and technology
Fusion reactors
Gelation
General and physical chemistry
Heat treatment
Microparticles
Microspheres
Nitric acid
Organic chemistry
Sol-gel processes
Sols
Titanium chlorides
Tritium
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Summary:Microspheres of Li2TiO3 were fabricated by a classical, inorganic sol-gel process from commercially available TiCl4. Elaborated process consists of the following main steps: (1) dissolving of TiCl4 in concentrated aqueous HCl and addition of LiOH; (2) formation of sol emulsion in 2-ethylhexanol-1 containing the surfactant SPAN-80 (EH); (3) gelation of emulsion drops by extraction of water with partially dehydrated EH; (4) impregnation of gel to Li:Ti molar ratio MR = 2; (5) thermal treatment at 1200°C in order to receive chloride free product. This temperature can be significantly lowered (to 750°C) by dechlorination starting solution TiCl4 by chemical treatment of the with nitric acid to form of nitrate-stabilized titania sols. Tritium release from sol-gel made Li2TiO3 microspheres were found very close to that observed for other traditional materials, however for the first sample process starts slightly earlier.
ISSN:0928-0707
1573-4846
DOI:10.1023/A:1020742930615