Reference : Rapid synthesis of submicron crystalline barium zirconate BaZrO3 by precipitation in ...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/14851
Rapid synthesis of submicron crystalline barium zirconate BaZrO3 by precipitation in aqueous basic solution below 100 degrees C
English
Boschini, Frédéric mailto [Université de Liège - ULg > Département de chimie (sciences) > Chimie inorganique structurale > > >]
Rulmont, André [Université de Liège - ULg > Département de chimie (sciences) > Chimie inorganique structurale > >]
Cloots, Rudi mailto [Université de Liège - ULg > Département de chimie (sciences) > Chimie inorganique structurale - Doyen de la Faculté des Sciences >]
Vertruyen, Bénédicte mailto [Université de Liège - ULg > Département de chimie (sciences) > Chimie inorganique structurale >]
2009
Journal of the European Ceramic Society
Elsevier Science
29
8
1457-1462
Yes (verified by ORBi)
International
0955-2219
Oxford
United Kingdom
[en] Perovskites ; Powders-chemical preparation ; Refractories
[en] Pure crystalline BaZrO3 powders can be produced by precipitation in highly basic aqueous solution. The influence of several synthesis parameters is studied. At high OH- concentration ([NaOH] = 20 mol/l), it is possible to obtain the well-crystallized stoichiometric perovskite phase at relatively low temperature (similar to 80 degrees C), after a short reaction time (15 min) and without requiring any precaution to avoid the presence of CO2. This synthesis method yields spherical particles, whose size can be controlled by changing the concentration of the Ba + Zr solution. No calcination treatment is necessary since the precipitate is crystalline. Suitable choice of the synthesis parameters ([NaOH] = 20 mol/l, [Ba + Zr] = 1 mol/l, reaction time= 15 min) yields a sub-micron precipitate with excellent densification behaviour. Corrosion tests in BaO-CuO melt show that similar to 98% dense BaZrO3 obtained by sintering at 1650 degrees C for 13 h could be used for crucibles in the synthesis of YBa2Cu3O7 superconducting single crystals. (C) 2008 Elsevier Ltd. All rights reserved.
Politique Scientifique Fédérale (Belgique) = Belgian Federal Science Policy
Researchers ; Professionals
http://hdl.handle.net/2268/14851
10.1016/j.jeurceramsoc.2008.09.001
The following article appeared in Journal of the European Ceramic Society and may be found on the editor website http://www.sciencedirect.com/

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