Investigation of the permeation behavior and stability of a Ba0.5Sr0.5Co0.8Fe0.2O3−δ oxygen membrane

Shao, Zongping

doi:10.1016/s0376-7388(00)00337-9

Cited by 993 publications

(241 citation statements)

References 23 publications

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“…Mixed conducting oxides have been attracting much attention in view of their promising applications, such as cathode and anode materials for solid oxide fuel cells [1], membranes for pure oxygen production and conversion of hydrocarbons to value-added products [2][3][4][5][6][7][8][9]. Over the past two decades, a number of mixed conducting materials based on perovskite-type oxides have been developed to meet many kinds of requirements in practical applications.…”

Section: Introductionmentioning

confidence: 99%

Design and experimental investigation of oxide ceramic dual-phase membranes

Zhu

Liu

et al. 2012

Journal of Membrane Science

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Section: Introductionmentioning

confidence: 99%

Design and experimental investigation of oxide ceramic dual-phase membranes

Zhu

Liu

et al. 2012

Journal of Membrane Science

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“…Among the MIECs, Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ (BSCF) is considered to be one of the most promising materials because its membranes show high oxygen permeation fluxes and excellent cathode performance for SOFCs (Shao and Haile, 2004;Shao et al, 2000;McIntosh et al, 2006). Recently, Zeng et al (2008Zeng et al ( , 2009) developed and reported a new perovskite system SrSc x Co 1-x O 3-δ (SSCx), which also exhibits excellent cathode performance and remarkably high oxygen fluxes.…”

Section: Introductionmentioning

confidence: 99%

EFFECTS OF SINTERING TEMPERATURE ON THE PERFORMANCE OF SrSc0.1Co0.9O3-δOXYGEN SEMIPERMEABLE MEMBRANE

Zeng

Wang

Falkenstein‐Smith

et al. 2015

Braz. J. Chem. Eng.

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-Our study investigates the influence of sintering temperature on the microstructure (grain size distribution, grain boundary length), electrical conductivity, and oxygen permeation properties of permeation membranes. For this purpose, SrSc 0.1 Co 0.9 O 3-δ samples with different microstructures were prepared by varying the sintering temperature from 1100 to 1250 °C. The average grain sizes were gradually increased, thus the grain boundary lengths decreased with increased sintering temperatures. The influence of the ceramic microstructure on total electrical conductivity was found to be negligible. The oxygen transport properties of the samples were characterized by permeation measurements as a function of temperature in an air/helium oxygen partial pressure gradient. The decrease of the sintering temperature, meaning a decrease of grain size and thus the increase of grain boundary length, leads to an enhanced oxygen permeation flux and a reduced activation energy. This implies that oxygen exchange and transport in the SrSc 0.1 Co 0.9 O 3-δ membranes occur more rapidly along grain boundaries than in the grain bulk.

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“…La mayoría de las síntesis industriales de polvos para aplicación en cerámicas se obtiene por medio del método cerámico tradicional o reacción en estado sólido, también llamada de mezcla de óxidos (Yang et al, 2003;Ikeguche et al, 2005;Casanova et al, 2004;Liu et al, 2000;Teraoka et al, 2002). Entre los varios métodos de síntesis encontrados en la literatura, podemos citar: evaporation by dryness (Teraoka et al, 1988;Yaremchenlo y Kharton, 1999), método Pechini (Waller et al, 1996;), sol-gel (Vargas et al, 2007), técnicas de los citratos (Shao et al, 2000;Dong et al, 2001;Tong et al, 2002), creación de complejo combinando EDTA-citrato (Shao et al, 2001;Ikeguchi et al, 2003;2005;, co-precipitación (Oliveira et al;Rivas et al, 2008;Ouaguenouni et al, 2009;Tanabe Y Assaf, 2009). …”

Section: Introductionunclassified

Síntesis y Refinado por el Método Rietveld de la fase perovsquita obtenida a partir del Método de Co-precipitación vía Oxalato

et al. 2011

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ResumenMaterial cerámico del tipo perovisquita SrCo 0,8 Fe 0,2 O 3-δ fue sintetizado usando el método de coprecipitación en medio oxalato. Durante los análisis térmico-gravimétrico y térmico-diferencial (TG/DTA) se verificó que independientemente de la naturaleza del reactivo o agente precipitante adoptado en la síntesis del precursor, la curva termogravimétrica presenta tres etapas, con pérdida de masa total de aproximadamente el 40 %. Mediante difracción de rayos X se verificó que el tamaño medio del cristalito fue de aproximadamente 77,22 nm utilizando nitrato de Hierro III, casi un 83 % superior al obtenido usando oxalato de Hierro III (42,23 nm). Sin embargo, la variación del agente precipitante no afectó prácticamente al tamaño mediano de cristalino (42,95 nm y 42,23 nm). El material presenta isotermas de tipo II, con una superficie específica de aproximadamente 4,41m 2 g -1 . Palabras clave: perovsquita, método co-precipitación, oxalato, refinamiento Rietveld Synthesis and Refining by Rietveld Method of the perovskite phase obtained using Oxalate Coprecipitation Method AbstractPowders of perovskite SrCo 0.8 Fe 0.2 O 3-δ were synthesized using oxalate co-precipitation method. According to the thermal gravimetry and differential thermal analysis (TG/DTA), total mass loss was 40 % corresponding to three different steps and the precipitant agent as well the starting chemical elements have no influence on the process. Perovskite phase was identified by x-ray diffraction and the average crystallite size was 77.22 nm using iron nitrate (III) as starting material while 42.23 nm were obtained using iron oxalate (III). Ammonium oxalate and equimolar mixtures of ammonium oxalate and oxalic acid were used as precipitant agents and the results shown that these reactants have no influence on the average crystallite size (42.95 nm and 42.23 nm). The material presents isotherms of type II, with especific surface of approximately 4,41m 2 g -1 .

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Investigation of the permeation behavior and stability of a Ba0.5Sr0.5Co0.8Fe0.2O3−δ oxygen membrane

Cited by 993 publications

References 23 publications

Design and experimental investigation of oxide ceramic dual-phase membranes

Design and experimental investigation of oxide ceramic dual-phase membranes

EFFECTS OF SINTERING TEMPERATURE ON THE PERFORMANCE OF SrSc0.1Co0.9O3-δOXYGEN SEMIPERMEABLE MEMBRANE

Síntesis y Refinado por el Método Rietveld de la fase perovsquita obtenida a partir del Método de Co-precipitación vía Oxalato

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