Compliant alkali silicate sealing glass for solid oxide fuel cell applications: The effect of protective alumina coating on electrical stability in dual environment

Chou, Yeong‐Shyung; Choi, Jung-Pyung; Stevenson, Jeffry W.

doi:10.1016/j.ijhydene.2012.08.084

Cited by 28 publications

(6 citation statements)

References 42 publications

(40 reference statements)

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“…These materials, used as sealants in SOFCs, belong to the SiO 2 -Al 2 O 3 system and contain different compositions of oxides including CaO, Na 2 O, MgO, K 2 O, B 2 O 3 , Y 2 O 3 , and BaO. 29,30 Another commonly used sealant material is compressed mica paper. 31,32 Two types of mica commonly used in SOFC applications are muscovite (potassium aluminum silicate hydroxide fluoride, KAl 2 (AlSi 3 O 10 )(F,OH) 2 ), and phlogopite (potassium magnesium aluminum silicate hydroxide, KMg 3 (AlSi 3 O 10 )(OH) 2 ).…”

Section: Corrosion Of Stainless Steelsmentioning

confidence: 99%

Influence of Water Concentration on High-Temperature Reactive Condensation of Chromium Vapors Generated in 800 °C Air

van Leeuwen,

Dowdy,

Guerrero

et al. 2024

J. Electrochem. Soc.

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Reactive evaporation of chromium (Cr) from stainless steels used in solid oxide electrochemical systems, such as solid oxide fuel cell (SOFC) and solid oxide electrolysis cell (SOEC) systems, is well-documented. However, the condensation and interactions of volatilized Cr species onto and with surrounding interfaces during complex and dynamic system exposures is less understood. Understanding these interactions during operation is critical for improving system performance and safeguarding environmental, health and safety, as some condensed species contain toxic hexavalent Cr (Cr(VI)). The objective of this study is to investigate the condensation pathways of Cr vapors within representative high-temperature system environments. To accomplish this objective, Cr vapors, produced by high-temperature (800°C) air exposures of trivalent chromium (Cr(III)) oxide (Cr2O3) powder with variable moisture content, were condensed onto various ceramic materials at lower temperatures (<400°C). The total amount of Cr and ratios of oxidation states were measured using inductively coupled plasma optical emission spectroscopy (ICP-OES) and diphenyl carbazide (DPC) colorimetric / direct UV-VIS spectrophotometer analyses. Increased Cr condensation was observed with increased water content, with similar Cr(VI) to total Cr ratios. Results and interpretations are discussed in context of improving understanding of Cr reactive condensation in SOFC/SOEC and related high-temperature materials and systems.

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Section: Corrosion Of Stainless Steelsmentioning

confidence: 99%

Influence of Water Concentration on High-Temperature Reactive Condensation of Chromium Vapors Generated in 800 °C Air

van Leeuwen,

Dowdy,

Guerrero

et al. 2024

J. Electrochem. Soc.

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“…A path towards this goal includes exploring the interactions between volatile Cr and ceramic surfaces such as aluminosilicates. These materials, used as sealants in SOFCs, belong to the SiO2-Al2O3 system and contain different compositions of oxides including CaO, Na2O, MgO, K2O, B2O3, Y2O3, and BaO (27,28). Another commonly used sealant material is compressed mica paper (29,30).…”

Section: Solid Oxide Fuel Cell Degradationmentioning

confidence: 99%

The Influence of Water Concentration on High-Temperature Reactive Evaporation and Condensation of Cr in 800°C Air

Leeuwen¹,

Dowdy²,

Guerrero³

et al. 2023

ECS Trans.

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Reactive evaporation of Cr from stainless steels used in solid oxide electrochemical systems, such as solid oxide fuel cell (SOFC) and solid oxide electrolysis cell (SOEC) systems, is well-documented as the cause of Cr poisoning; however, the condensation and interactions of volatilized Cr species onto and with surrounding interfaces during complex and dynamic system exposures is less understood. Understanding these interactions during operation is critical for improving system performance and safeguarding environmental, health and safety, as some condensed Cr forms toxic hexavalent chromium (Cr(VI)) species. The objective of this study is to investigate and report on condensation pathways of Cr vapors within representative high-temperature system environments. To accomplish this objective, Cr vapors, produced by high-temperature (800°C) air exposures of trivalent chromium (Cr(III)) oxide (Cr2O3) powder with variable moisture content, were condensed onto various ceramic materials at lower temperatures (<400°C). Both the total amount of Cr and ratios of oxidation states were measured using ICP-MS and colorimetric analyses. An increase of Cr condensation was observed with increased water content, with similar Cr(VI) to Cr(III) ratios. Results and interpretations are discussed in context of improved understanding of Cr reactive evaporation and condensation in SOFC/SOEC and related high-temperature materials and systems.

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“…Chou et al [33][34][35] (application of 1.3V) respectively. The two polarised interfaces differ significantly from each other.…”

Section: Figure2: Xrd Indexed Patterns Of V10 Glass-ceramic After Thementioning

confidence: 99%

“…In spite of this, many alkali-containing glassy systems have been successfully tested in the past [20,22,25,[33][34][35][36][37][38][39]. Some of them were also thesubject of patents [40][41][42] or are commercially available (e.g.SCN-1 from SEM-COM, Toledo, OH).…”

Section: Introductionmentioning

confidence: 99%

“…), in contact with Crofer22APU or AISI441 stainless steels, did not show any formation of volatile species and guaranteed gas tightness even after long term exposure (more than 500h). For example, Chou et al [33][34][35] successfully tested commercial sealant SCN-1, containing Na and K, for sealing AISI441 stainless steel in different relevant conditions by conducting thermal cycling, dual atmosphere and long term aging (at least 500h at 700°C, 750°C and 800°C). The long term (up to 10,000h at 800°C) compatibility between alkali containing glasses and 8% yttria-stabilised zirconia (8YSZ), which is the electrolyte material, was evaluated by Shyam et al [43].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of electric load and dual atmosphere on the properties of an alkali containing diopside-based glass sealant for solid oxide cells

Sabato

Rost

Schilm

et al. 2019

Journal of Power Sources

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Compliant alkali silicate sealing glass for solid oxide fuel cell applications: The effect of protective alumina coating on electrical stability in dual environment

Cited by 28 publications

References 42 publications

Influence of Water Concentration on High-Temperature Reactive Condensation of Chromium Vapors Generated in 800 °C Air

Influence of Water Concentration on High-Temperature Reactive Condensation of Chromium Vapors Generated in 800 °C Air

The Influence of Water Concentration on High-Temperature Reactive Evaporation and Condensation of Cr in 800°C Air

Effect of electric load and dual atmosphere on the properties of an alkali containing diopside-based glass sealant for solid oxide cells

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