| Titre : |
Preparation and characterization of nanocrystalline and mesoporous strontium titanate thin films at room temperature |
| Type de document : |
texte imprimé |
| Auteurs : |
M. Mohammadi, Auteur ; D. J. Fray, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 585-593 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Caractérisation
Matériaux nanocristallins
Sol-gel, Procédé
Température de laboratoire
Titanate de strontium
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The low temperature perovskite-type strontium titanate (SrTiO3) thin films and powders with nanocrystalline and mesoporous structure were prepared by a straightforward particulate sol–gel route. The prepared sol had a narrow particle size distribution with hydrodynamic diameter of about 17 nm. X-ray diffraction (XRD) revealed that the synthesized powders had a perovskite-SrTiO3 structure with preferable orientation growth along the (1 0 0) direction. TEM images showed that the average crystallite size of the powders annealed in the range 300–800°C was around 8 nm. FE-SEM analysis and AFM images revealed that the deposited thin films had mesoporous and nanocrystalline structure with the average grain size of 25 nm at 600°C. Based on Brunauer–Emmett–Taylor (BET) analysis, the synthesized powders showed mesoporous structure with BET surface area in the range 92–75 m2/g at 400–600°C. One of the smallest crystallite sizes and one of the highest surface areas reported in the literature were obtained, which can be used in many applications, such as photocatalysts. |
| Note de contenu : |
EXPERIMENTAL : Preparation of the strontium titanate sol - Preparation of strontium titanate thin films - Synthesis of strontium titanate powders.
RESULTS AND DISCUSSION : Particle size - Crystal characterization - Thermal analysis - Microstructure - Specific surface area. |
| DOI : |
10.1007/s11998-011-9347-9 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9347-9.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12234 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 5 (10/2011) . - p. 585-593
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Preparation and characterization of nanocrystalline and mesoporous strontium titanate thin films at room temperature in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 5 (10/2011)
