Preparation and characterization of nanocrystalline and mesoporous strontium titanate thin films at room temperature / M. Mohammadi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 5 (10/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 5 (10/2011) . - p. 585-593 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 [article]

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