Reference : Synthesis of La0.9Sr0.1Ga0.8Mg0.2O2.85 by successive freeze-drying and self-ignition of ...
Scientific journals : Article
Engineering, computing & technology : Chemical engineering
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/19797
Synthesis of La0.9Sr0.1Ga0.8Mg0.2O2.85 by successive freeze-drying and self-ignition of a hydroxypropylmethyl cellulose solution
English
Traina, Karl mailto [Université de Liège - ULg > Département de chimie (sciences) > Chimie inorganique structurale >]
Steil, M. C. [> > > >]
Pirard, Jean-Paul mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Chimie physique appliquée > >]
Henrist, Catherine mailto [Université de Liège - ULg > Département de chimie (sciences) > Chimie inorganique structurale >]
Rulmont, André mailto [Université de Liège - ULg > Département de chimie (sciences) > Département de chimie (sciences) >]
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 >]
2007
Journal of the European Ceramic Society
Elsevier Science
27
12
3469-3474
Yes (verified by ORBi)
International
0955-2219
Oxford
United Kingdom
[en] cryogel ; ionic conductor
[en] The present paper reports the synthesis of La0.9Sr0.1Ga0.8Mg0.2O2.85 perovskite powders by a method combining freeze-drying and self-ignition of an aqueous solution of metallic nitrates containing hydroxypropylmethyl cellulose. The precursor powder obtained after self-ignition was submitted to various thermal treatments and the resulting powders were characterized by X-ray diffraction, electron microscopy, nitrogen adsorption-desorption isotherm analysis, mercury porosimetry and laser granulometry. It turns out that this synthesis method yields single-phase powders with good homogeneity and sinterability properties. The precursor powder treated at 1200 degrees C presents a coral-like structure which collapses under application of low uniaxial pressure, resulting in a narrow grain size distribution suitable for sintering (98.8% relative density for a pellet sintered at 1400 degrees C during 1 h). The fact that no milling step is necessary is an additional advantage of this method, which shows promising prospects for the synthesis of other multicationic oxides. (c) 2007 Elsevier Ltd. All rights reserved.
http://hdl.handle.net/2268/19797
also: http://hdl.handle.net/2268/19794
10.1016/j.jeurceramsoc.2007.01.017

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