Synthesis and properties of Y2O3 powder obtained by different methods

Three different wet chemical methods for the preparation of fine yttrium oxide powders from chloride solutions were compared: (a) precipitation with ammonia, (b) precipitation with urea, and (c) precipitation from an Y-organometallic complex. Powders with widely different morphological characteristi...

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Published in:Journal of the European Ceramic Society 1992, Vol.9 (1), p.75-82
Main Authors: DJURICIC, B, KOLAR, D, MEMIC, M
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Miscellaneous
Technical ceramics
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description Three different wet chemical methods for the preparation of fine yttrium oxide powders from chloride solutions were compared: (a) precipitation with ammonia, (b) precipitation with urea, and (c) precipitation from an Y-organometallic complex. Powders with widely different morphological characteristics resulted. Ammonia precipitated powder was strongly agglomerated. Urea precipitated powder consisted of spherical particles with narrow size distribution (mean size about 0.4 micron), whereas powder obtained from the Y- organometallic complex had a 'foamy structure' and consisted of soft agglomerates very sensitive to mechanical treatment. Powders were characterised by SEM and TEM techniques, and it was observed that agglomerates consist of randomly oriented crystallites with nearly spherical shape. 14 refs.
doi_str_mv 10.1016/0955-2219(92)90080-W
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subjects Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Miscellaneous
Technical ceramics
title Synthesis and properties of Y2O3 powder obtained by different methods
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