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Synthesis of Tin Oxide Hydrate (SnO2 ˙ xH2O) Gel and its Effects on the Hydrothermal Preparation of BaSnO3 Powders

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Perovskite-type BaSnO3 powders with a particle size of 30–60 nm have been prepared from tin oxide hydrate (SnO2 ˙ xH2O) gel via the hydrothermal synthesis route. The reactivity of the synthesized SnO2 ˙ xH2O was found to be dependent on the pH value of the mixture of tin chloride and the ammonia solution. The most reactive SnO2 ˙ xH2O gel was obtained at a pH value near 2. The hydrothermal products derived from this reactive gel were characterized with thermograrimetric/differential thermal analysis, Fourier transform infrared spectrometry, X-ray diffraction and high-resolution scanning electron microscopy. The BaSn(OH)6 phase in the as-prepared powder was found to convert into an amorphous phase other than into the BaSnO3 phase. The BaSnO3 powder crystallizing from the amorphous phase at 260°C for 4 h has better sintering properties than the commercial one.

Affiliations: 1: Leibniz-Institut fuer Neue Materialien gGmbH, Im Stadtwald, Gebaeude D2 2, 66123 Saarbruecken, Germany;, Email: Wensheng.Lu@inm-gmbh.de; 2: Universitaet des Saarlandes, Lehrstuhl fuer Neue Materialien, Beethovenstraße Zeile 4, 66125 Saarbruecken-Dudweiler, Germany

10.1163/156855208X291666
/content/journals/10.1163/156855208x291666
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/content/journals/10.1163/156855208x291666
2008-01-01
2016-12-04

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