Gel Combustion
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Preparation and characterization of yttria stabilized zirconia (YSZ) films deposited by dip-coating on LSM-YSZ substrate with different proportions
ABSTRACT In this work, sol-gel/dip-coating process for obtaining yttria stabilized zirconia (YSZ, ZrO2–8% Y2O3) films deposited onto LSM-YSZ (lanthanum strontium manganite (LSM, La0.7Sr0.3MnO3) mixed with YSZ) with different proportions (20/80, 50/50, 80/20) was investigated. The films were deposited on substrate varying the number of layers deposited. LSM
Matéria (Rio J.). Publicado em: 25/11/2019
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2. Y3+ substituted Sr-hexaferrites: sol-gel synthesis, structural, magnetic and electrical characterization
Resumo Hexaferritas de estrôncio com adição de Y3+ com composição química SrYxFe12-xO19 (x= 0,0, 0,5, 1,0, 1,5) foram sintetizadas com sucesso pelo método sol-gel com autocombustão. Os estudos estruturais e morfológicos das amostras preparadas foram investigados usando a técnica de difração de raios X, espectroscopia de energia dispersiva, micros
Cerâmica. Publicado em: 06/06/2019
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3. Preparation and Characterization of Nanoscale Cobalt Blue Pigment for Ceramic Inkjet Printing by Sol-Gel Self-Propagating Combustion
Cobalt blue pigments were prepared by self-propagating combustion followed by sol-gel method using aluminum nitrate and cobalt nitrate as the raw material. X ray diffraction (XRD), scanning electron microscopy (SEM), fiber optic spectrometer and colorimetric analysis were used to investigate the effect of reaction temperature, metal ion concentration and dis
Mat. Res.. Publicado em: 27/07/2017
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4. Synthesis of MgAl2O4 by Gelatin Method: Effect of Temperature and Time of Calcination in Crystalline Structure
Magnesium aluminate can be obtained by the methods: ceramic method, sol-gel, co-precipitation, hydrothermal and combustion. However, this work presents a simple and low cost route to obtain MgAl2O4 through the gelatin method. The main objective was to use gelatin as an organic precursor and to verify the influence of temperature and time of calcination on th
Mat. Res.. Publicado em: 06/07/2017
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5. Combustion synthesis of Co-Cu-Mn oxides deploying different fuels
ABSTRACTTernary spinel-like oxides such as CuFeMnO4, CoCuMnOxand CuCr2O4 are attractive materials due to their absorbent properties when used as pigments for selective surfaces thus improving solar heaters efficiency. These materials are obtained through sol-gel and sol-gel-combustion methods. This work proposes the synthesis of mixed oxides of Co, Cu and Mn
Matéria (Rio J.). Publicado em: 2015-09
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6. Kinetic Parameters of Soot Oxidation Catalyzed by Nanosized ZnO-CeO2 Solids
Catalytic combustion of soot was performed over ZnO:CeO2 catalysts obtained via a non‑alkoxide sol-gel route. Different kinetics parameters were calculated through thermal analyses, thus, enabling the correlation between the experimental data and the decomposition mechanisms probably associated with the soot decomposition in each case.
J. Braz. Chem. Soc.. Publicado em: 2015-07
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7. Innovative Coating Method of MgAl2O4 or ZnAl2O4 on α-Al2O3 Spheric Nuclei
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 vac
Mat. Res.. Publicado em: 2015-04
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8. Síntese e caracterização de CaZrO3 e BaZrO3 nanoestruturados
In this work, nanostructured samples of barium zirconate (BaZrO3) and calcium zirconate (CaZrO3) were synthesized by the gel-combustion method, using glycine as fuel. The ceramic powders were calcined at 550 °C for 2 h and subsequently heat treated at 1350 °C for 10 min (fast-firing). The X-ray diffraction technique was employed to identify and characteriz
Quím. Nova. Publicado em: 2013
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9. Síntese de manganita dopada com estrôncio e cobaltita dopada com antimônio e caracterização microestrutural
The great variety of properties of oxides with the perovskite structure allows their application in several fields of technology. Specially, the electrochemical properties and the thermal stability of some of these compounds make these materials the most used in devices for energy generation such as the solid oxide fuel cells (SOFC). SOFC¿s are devices the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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10. Influence of annealing on magnesioferrite nanoparticles synthesized by a sol-gel/combustion method
Nanocrystalline particles of magnesioferrite (MgFe2O4) were prepared by a sol-gel/combustion method using iron nitrate, Fe(NO3)3.9H2O, magnesium nitrate, Mg(NO3)2.6H2O, and citric acid, C6H8O7.H2O, and annealed for 2 hours at 400, 500 and 600 °C. The average particle size, determined by X ray diffraction, was found to depend on the annealing temperature an
Publicado em: 2010
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11. Influence of annealing on magnesioferrite nanoparticles synthesized by a sol-gel/combustion method
Nanocrystalline particles of magnesioferrite (MgFe2O4) were prepared by a sol-gel/combustion method using iron nitrate, Fe(NO3)3.9H2O, magnesium nitrate, Mg(NO3)2.6H2O, and citric acid, C6H8O7.H2 O, and annealed for 2 hours at 400, 500 and 600 °C. The average particle size, determined by X ray diffraction, was found to depend on the annealing temperature an
Materials Research. Publicado em: 2009-06
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12. Degradação do PMMA através da reação despolimerização uitlizando catalisadores de óxidos mistos
In this work, mixed oxides were synthesized by two methods: polymeric precursor and gel-combustion. The oxides, Niquelate of Lanthanum, Cobaltate of Lanthanum and Cuprate of Lanthanum were synthesized by the polymeric precursor method, and treated at 300 C for 2 hours, calcined at 800 C for 6h in air atmosphere. In gel-combustion method were produced and oxi
Publicado em: 2009