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Showing 1 to 10 of 10 for “"Pechini"”.
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Solar receiver coating development: the synthesis and growth of copper chromite spinel particles across sol-gel routes and calcination profiles
… coatings that can prevent oxidation. The Pechini and modified Pechini sol-gel methods were directly compared as two routes for nanoparticle creation. Particle growth was studied by heating the nanoparticles at different temperatures (650°C, 750°C, 850°C) and times (between 1 h and 24 h) …
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Preparation and characterisation of double doped-CeO₂ systems
… acid co-precipitation and a variant of the Pechini method. X-ray diffraction of the oxide powders indicates that they are single-phase cubic fluorite materials. High temperature x-ray diffraction studies show that there is no evolution of secondary phases up to the maximum temperature of …
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Untersuchungen zum Phasendiagramm und der Kationendiffusion im System La 1-x Sr x Ga 1-y Mg y O 3-(x+y)/2 (LSGM)
… (X+Y)/2)), were then prepared using the Pechini method [1]. Characterization by X-ray diffraction showed that all resulting samples, which are preannealed at 1400°C in air are single phase [2]. 2. Results for the cation self and impurity diffusion coefficients of different cations were …
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Design of advanced Catalysts and new Strategies for biogas Reforming
… con níquel, empleando un método de síntesis de Pechini modificado que permite la incorporación controlada de Ni en la estructura. Se evalúa el impacto de la carga metálica y de la temperatura de calcinación sobre la eficiencia y estabilidad en el reformado seco de metano. En paralelo, se explora …
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Nanopartículas de ouro suportadas em óxidos mistos de cério e ferro para a redução de NO por CO
… 0 ≤ x ≤ 0.2) were synthesized by the Pechini method and calcined in a two-step procedure (300 and 500 ºC). The oxides were extensively characterized to evidence the effects of Fe inserption into the CeO2 structure. Iron incorporation changed the CeO2 reducibility, reduced the …
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Investigation on the phase stability and defect structure of Li-Mn-O and Li-Me-Mn-O spinel (Me=Mg, Ni, Co)
… Mg, Co, Ni) spinel were synthesized in modified Pechini method. The phase stability was investigated by in situ XRD, TG and DTA. A new phase diagram is put forward, in which the stability region is described by upper and lower critical temperature, Tc1 and TcL. Both Tc1 and TcL decrease …
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Estudio y optimización de la respuesta electroquímica de materiales para cátodos de celdas combustibles
… utilizando para su síntesis el Método Químico de Pechini. Se pudo demostrar que la sustitución con Co en esta estructura presenta un mejor desempeño como material catódico
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Defect chemistry, transport properties and thermodynamic stability of acceptor doped and undeoped layered La 2 NiO 4
… of the ceramic powder prepared by a modified Pechini process, was analysed by X-ray diffraction. The prepared disc-shape membranes was analised by SEMM and EDX. Oxygen permeation measurements in air/Ar gradients were performed and the composition analysis of the permeate stream was performed …
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Síntese in situ da liga de FeCo altamente estável encapsulada em carbono a partir do etanol
… oxide in a 1:1 ratio was synthesized using the Pechini method. The material was subjected to in situ reduction, by the CVD method, using ethanol as the initial reagent at temperatures of 400, 500, 600 and 700ºC. The reactions were studied by Gas Chromatography (GC), from gas aliquots collected …
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Estudio de ánodos basados en (La,Sr)TiO3 y CeO2 modificados con Pd para su aplicación en celdas IT-SOFC alimentadas con CH4
… (𝑥� = 0,4), sintetizadas mediante el método Pechini modificado. Dentro de la serie estequiométrica, la composición La0,3Sr0,7TiO3±δ presentó el mejor desempeño eléctrico a 900 °C en atmósfera reductora. Tanto esta composición como la no estequiométrica, demostraron valores de conductividad …