Mechanical performance of LaCrO3 doped with strontium and cobalt for SOFC interconnect

Acchar, Wilson; Sousa, Cláwsio Rogério Cruz de; Mello-Castanho, Sonia Regina Homem de

doi:10.1016/j.msea.2012.04.026

Cited by 13 publications

(8 citation statements)

References 17 publications

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“…Table 5 Advantages and disadvantages of various fabrication techniques [87][88][89][90][91][92]98]. Table 6 Mechanical properties of various doped Lanthanum chromite materials [110,155,[193][194][195][196][197]. Table 7.…”

Section: Discussionmentioning

confidence: 99%

“…20), resulting into change in conductivity [184]. The mechanical properties (elastic modulus, fracture toughness, fracture strength, and Weibull modulus) of doped lanthanum chromite tend to vary with different dopant type and level at OTM operating conditions (1000°C and 0.21-10 -22 atm) as shown in Table 6 [110,155,[193][194][195][196][197]. It is observed that the flexure strength of the material increases with increase in the level of A-site dopants (Sr and Ca) due to enhanced densification [110,193] [193].…”

Section: Electrical Conductivitymentioning

confidence: 99%

“…• Low density (< 60%) and ionic conductivity Table 5 Advantages and disadvantages of various fabrication techniques [87][88][89][90][91][92]98]. Table 6 Mechanical properties of various doped lanthanum chromite materials [110,155,[193][194][195][196][197]. Table 7 Summary -Properties of A and/or B-site doped lanthanum chromite materials [32][33]38,110,[112][113][114][115]120,123,126,[128][129][130][131]134,[139][140][141][142]149,[183][184][185][193][194].…”

Section: Perovskites Ionic/electronic/mixed Advantages Disadvantages mentioning

confidence: 99%

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Lanthanum chromite based perovskites for oxygen transport membrane

Gupta

Mahapatra

Singh

2015

Materials Science and Engineering: R: Reports

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Judicious selection of mixed ionic-electronic conducting (MIEC) perovskite oxide as oxygen transport membrane (OTM) offers the potential to enhance overall process economics and systems performance for a wide variety of industrial applications ranging from clean and efficient energy conversion (oxy-combustion) to selective gas separation (high purity oxygen production) and value added chemicals (syngas and liquid fuel) production with near-zero greenhouse gas emissions. Doped lanthanum chromite perovskites have been considered as promising material of choice for oxygen transport membrane (OTM) due to their superior thermo-chemical stability in aggressive environment (800-1000°C, 0.21-10-20) than the other mixed ionic-electronic conducting (MIEC) perovskites such as ferrites and cobaltite's. Thermo-physical properties of the lanthanum chromite, required for optimum oxygen transport can be tuned by modifying the crystal structure, chemical

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Section: Discussionmentioning

confidence: 99%

Section: Electrical Conductivitymentioning

confidence: 99%

Section: Perovskites Ionic/electronic/mixed Advantages Disadvantages mentioning

confidence: 99%

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Lanthanum chromite based perovskites for oxygen transport membrane

Gupta

Mahapatra

Singh

2015

Materials Science and Engineering: R: Reports

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“…For the purpose of full option of this experiment, La 0.08 Sr 0.20 Cr 0.92 Co 0.08 O 3 was used for the fuel cell interconnect. Investigation by Acchar et al has shown that this interconnect has the best composition of materials to achieve the ideal features of an interconnect; for example high density, porosity, and high conductivity [20].…”

Section: Electrical Stability Analysismentioning

confidence: 99%

Seal Glass for Solid Oxide Fuel Cells

Suklueng¹

2018

Advances in Glass Science and Technology

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Barium calcium aluminum boro-silicate glass (BCABS) is used as a sealant for Solid Oxide Fuel Cells (SOFCs) to protect against air and hydrogen gas leaking at 800 C. One major problem is the chemical reaction of this glass with barium oxide and other materials in the composition such as BaY Co -Fe (BYCF) and Ba-Sr-Co-Fe (cathode) used in the fuel cell components, leading to the formation and spreading of barium aluminosilicate glass on the cathode surface in the fuel cell. This investigation indicated that adding 0.4 mol% ZrO 2 to BCABS prevents the formation of barium aluminosilicate glass. Generally, the sealing glass of fuel cells must show high resistivity for no disturbance to electricity from the fuel cell system when generating the electron. The 0.4 mol% ZrO 2 to BCABS is generated with resistivity of 4 MΩ that is useful for SOFCs technology. The thermal expansion coefficient (TEC) in SOFCs is the major condition for producing the cell layers. The thermal expansion coefficient of SOFCs based on each layer (cathode, electrolyte, anode, interconnect and sealant) should be closed to prevent broken cells. The thermal expansion coefficient is 12.40 Â 10 À6 / o C matched with the TEC of the GDC 10 electrolyte. Therefore, BCABS glass with 0.4 mol%ZrO 2 generated a novel composite for SOFCs.

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“…Composições La 1-x Sr x Cr 1-y Co y O 3 apresentaram valores de resistência mecânica e de dureza de 62 MPa e 5,98 GPa, respectivamente [41], e módulo de Weibull, a 1000 °C, de 9,7, mostrando boa confiabilidade nos resultados [42], com modos de fratura inter e transgranulares para comportamento de deformação frágil [41].…”

Section: Expansão Térmica E Resistência Mecânicaunclassified

Cromito de lantânio: material para interconectores de células a combustível de óxido sólido - uma revisão

2015

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INTRODUÇÃOMaterial sintético de grande importância tecnológica, o cromito de lantânio ainda se destaca como o principal material capaz de conduzir eletricidade em altas temperaturas suportando diferentes tipos de atmosferas frente a materiais como os aços inoxidáveis. Neste trabalho são revisadas as características, as propriedades, as possíveis aplicações e o comportamento durante o processamento do cromito de lantânio e de composições com diferentes tipos e teores de elementos dopantes. Estrutura cristalinaO LaCrO 3 apresenta uma estrutura cristalina do tipo perovskita, sendo considerado como pseudo-perovskita ou perovskita distorcida, por não ser perfeitamente cúbica como normalmente ocorre nas demais perovskitas da família ABO 3 [1]. Formando-se a partir de 650 °C, o LaCrO 3 apresenta célula unitária do tipo ortorrômbica (Pnma), ocorrendo uma transformação alotrópica para a estrutura romboédrica (R3c) durante o aquecimento no intervalo de temperatura entre 240 e 280 °C, tendo como consequência redução no volume do retículo, principalmente devido à redução de tamanho no octaedro CrO 6 . [2,3]. Trabalhos existentes [4] sugerem que esta estrutura permanece estável até a temperatura aproximada de 1800 °C, onde ocorre a transformação da estrutura romboédrica para a cúbica (Pm-3m) [5,6] ) é um material cerâmico sintético, que apresenta como principais características boa condutividade elétrica em altas temperaturas (> 800 °C), estabilidade química e física em atmosferas oxidantes e redutoras e, significativa atividade catalítica quando na forma de pós. Estas características o tornam atrativo para diversas aplicações de interesse tecnológico, como catalisadores, resistências para fornos de alta temperatura e geração de energia elétrica, sendo que nesse campo é potencialmente o material mais adequado para utilização como interconector em células a combustível de óxido sólido (Solid Oxide Fuel Cell -SOFC). As características intrínsecas, propriedades e técnicas de processamento do cromito de lantânio são consideradas neste trabalho por meio de uma revisão dos principais estudos relatados ao longo dos últimos 40 anos. Palavras-chave: cromito de lantânio, SOFC, revisão. AbstractThe lanthanum chromite (LaCrO 3 ) is a synthetic ceramic material, which has as main characteristics of good electrical conductivity at high temperatures (> 800 °C), physical and chemical stability in oxidizing and reducing atmospheres, and a significant catalytic activity when used as powder. These features make it attractive for various technological applications such as catalysts, resistance to high temperature furnaces and electric power generation, and this field is potentially the most appropriate material for use as interconnector in Solid Oxide Fuel Cells (SOFC). The intrinsic characteristics, properties and processing of lanthanum chromite are detailed in this paper through a review of major studies reported over the past 40 years.

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Mechanical performance of LaCrO3 doped with strontium and cobalt for SOFC interconnect

Cited by 13 publications

References 17 publications

Lanthanum chromite based perovskites for oxygen transport membrane

Lanthanum chromite based perovskites for oxygen transport membrane

Seal Glass for Solid Oxide Fuel Cells

Cromito de lantânio: material para interconectores de células a combustível de óxido sólido - uma revisão

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