Innovative Coating Method of MgAl2O4 or ZnAl2O4 on α-Al2O3 Spheric Nuclei
| Autor: | Osvaldo A. Scelza, Sergio R. de Miguel, Sonia A. Bocanegra, Graciela Mabel Baez |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Recubrimientos y Películas
Materials science INGENIERÍAS Y TECNOLOGÍAS engineering.material Catalysis Coating Ingeniería de los Materiales General Materials Science Dehydrogenation Composite material Thin film Porosity Materials of engineering and construction. Mechanics of materials electron microscopy Mechanical Engineering Spinel Condensed Matter Physics catalytic properties X-ray diffraction purl.org/becyt/ford/2 [https] thin films Mechanics of Materials TA401-492 engineering SPHERES purl.org/becyt/ford/2.5 [https] Layer (electronics) chemical synthesis |
| Zdroj: | Materials Research, Volume: 18, Issue: 2, Pages: 404-410, Published: APR 2015 Materials Research v.18 n.2 2015 Materials research (São Carlos. Online) Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL Materials Research, Vol 18, Iss 2, Pp 404-410 (2015) CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| Popis: | Structured materials composed of α-Al2O3 spheres covered with a porous and thin layer of MgAl2O4 or ZnAl2O4 were obtained. The innovative coating method developed consists in the formation of a precursor gel of MgAl2O4 or ZnAl2O4 by citrate-nitrate combustion method. The alumina spheres are submerged in this gel and then submitted to a drying process in vacuum and to calcinations with N2 and N2/O2. SEM results showed that a very rough and porous layer uniformly covers the spheres. The thickness of the layer reaches the maximum value of 16 µm in the sample coated with two layers of ZnAl2O4. XRD results confirmed the MgAl2O4 or ZnAl2O4 spinel formation in the layered material. The structured materials were used as Pt catalysts supports, showing a good catalytic activity in the n-butane dehydrogenation reaction. Fil: Baez, Graciela Mabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina Fil: Scelza, Osvaldo Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina Fil: de Miguel, Sergio Ruben. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina Fil: Bocanegra, Sonia Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica ; Argentina |
| Databáze: | OpenAIRE |
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