Characteristics of glass sealants for intermediate-temperature solid oxide fuel cell applications

Wang, Sea-Fue; Lu, His-Chuan; Liu, Yixin; Hsu, Yung−Fu; Liu, Zu-You

doi:10.1016/j.ceramint.2017.05.211

Cited by 26 publications

(7 citation statements)

References 32 publications

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“…In fact, glass-ceramics are considered to be the most promising materials for gas-tight sealing due to their low cost, ease of application, and achievable good properties such as low electrical conductivity, compatible coefficient of thermal expansion (CTE), good adhesion, and limited reactivity with other SOC components and atmospheres. 3 In the last two decades, various tests have been used to study the fracture toughness, [9][10][11][12] fracture strength [13][14][15][16][17] as well as creep behavior 18,19 of glass-ceramic sealants in a joined geometry, where the respective results appeared to be especially useful for comparing the quality of different joints. However, the mechanical properties measured in different laboratories were not always comparable, indicating the urgent need for more standardized tests.…”

Section: Methods Of Characterizationmentioning

confidence: 99%

Advanced analysis of flexural test results of sealant for solid oxide cells

Hasanabadi

Kokabi

Faghihi-Sani

et al. 2021

Int J Applied Ceramic Tech

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The conventional relations for calculating the fracture stresses consider only elastic deformation but ignore viscoelastic and viscoplastic behaviors. Measuring the joining strength of a composite glass sealant‐metallic interconnect specimen at solid oxide cell application relevant at high temperatures is a case where such effects can become significant. In the current study, three‐point and four‐point bending test results were analyzed using the finite element method (FEM) to assess systematic and random errors. It is shown that plastic deformation of the steel interconnect material at high temperature, although having a large effect on the stress distribution in the steel/glass–ceramic/steel specimen, does not cause a significant difference in the FEM‐derived true and the standard equation‐based analytically derived flexural stress values. It is also observed that even if the viscous flow of the glass–ceramic is considered in the simulations, the samples’ behavior in a realistic testing condition is not biased significantly by inelastic behavior due to the short testing time.

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Section: Methods Of Characterizationmentioning

confidence: 99%

Advanced analysis of flexural test results of sealant for solid oxide cells

Hasanabadi

Kokabi

Faghihi-Sani

et al. 2021

Int J Applied Ceramic Tech

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“…As for some properties that need attention including i. Thermal Properties, a special benefit in the formation of glass-ceramics is that products show almost zero shrinkage that could be made [12,13]. ii.…”

Section: Sealant Ceramic Propertiesmentioning

confidence: 99%

“…As a result, Tg data are available for various glass compositions. The coefficient of thermal expansion must be appropriate with other cell components, such as Yttria-stabilized (YSZ) electrolytes and interconnect material, to reduce thermal pressure [12,13].…”

Section: Rigid Bonded Sealantmentioning

confidence: 99%

Progress in Glass-Ceramic Seal for Solid Oxide Fuel Cell Technology

Gunawan

Sulistyo

Setyawan³

2021

ARFMTS

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Solid oxide fuel cells (SOFCs) have emerged as promising energy conversion devices nowadays. SOFC consists of several components such as cathode, anode, electrolyte, interconnects, and sealing materials. In planar SOFC stack construction, the sealant and interconnection functions play an important role. Glass and ceramics are quite popularly used as SOFC sealing materials to achieve several functions including preventing leakage of fuel and oxidants in the stack and electrically isolating cells in the stack. In this review, material preparation, material composition, ceramic properties especially thermal properties are compared from various systems that have been developed previously. The main challenges and complexities in the functional part of SOFC sealants include: (i) chemical incompatibility and instability in the oxidizing and reducing environment by adjusting the value of the thermal expansion coefficient (CTE) with the interconnecting material during SOFC operation, and (ii) insulation of oxidizing fuels and gases by matching CTE anode and cathode. Also, the sealant glass transition determines the maximum permissible working temperature of the SOFC. The choice of method and analysis will provide data on various ceramic attributes. The search for thermal attributes consisting of Glass transition (Tg), Deformation temp (Td), Crystallization temp (Tx), Melting pt (Tm) became a focus on SOFC sealant development.

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“…This material is then synthesized with other oxide materials (AlO 3 , BaO, CaO, MgO, TiO 2 and others) as a reinforcement. The material developed must be able to withstand the load cycle temperature and will support the operation for a relatively long time [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Rice Husk Ash Selection as Solid Oxide Fuel Cell Sealing Ceramic Material

2020

IJETER

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Various ceramic glass compositions have been designed and tested as Rigid Bonded Sealing in Solid Oxide Fuel Cell (SOFC) applications. The ion of silica dioxide (SiO 2 ) synthesized with other oxides as character enhancers. SiO 2 can be obtained from mines or from decomposition of living things, one of which is Rice Husk Ash (RHA) as a thermochemical transformation product. Conversion process conditions e.g. (pyrolysis, gasification or combustion) may affect the physical-chemical characteristics of the final product. RHA generally contains approximately 60% silica (SiO 2 ), 10-40% carbon and a small portion of other material compositions. In this study, an RHA production process was carried out from Rice Husk (RH) samples from Klaten (R1) and Wonosobo (R2) Central Java. The calcination process was carried out by washing the RH route with Sodium Lauryl Sulfate (SLS) as a surfactant and 0.5 M sulfuric acid (H 2 SO 4 ) for leaching. The drying process was done with an oven for 24 hours at 110 0 C. The production process ended with burning in a muffle furnace at 650 0 C for 2 hours. The characterization of RHA from both samples produced amorphous silica (SiO 2 ) with an average particle size of R1 = 0.217 and R2 = 0.268 μm. Both samples were consisted of amorphous silica with purities above 97%. The surface area of silica grains produced after washing RH with sulfuric acid are R1 = 265.73 m² / g R2 =294.37 m² / g. The average pore diameter of R1 is ~ 2.04 nm and R2 is 1.89 nm, indicating that the silica produced by R1 is mesoporous while R2 is microporous. Microstructural visualization through SEM strengthens the information of RHA produced. High purity amorphous silica has a large grain surface area. useful as an absorber or supporting catalyst in chemical synthesis. This supports the synthesis of RHAwith other oxides in its production as a seal to the SOFC system.

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Characteristics of glass sealants for intermediate-temperature solid oxide fuel cell applications

Cited by 26 publications

References 32 publications

Advanced analysis of flexural test results of sealant for solid oxide cells

Advanced analysis of flexural test results of sealant for solid oxide cells

Progress in Glass-Ceramic Seal for Solid Oxide Fuel Cell Technology

Rice Husk Ash Selection as Solid Oxide Fuel Cell Sealing Ceramic Material

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