Development and performance of diopside based glass-ceramic sealants for solid oxide fuel cells

Goel, Ashutosh; Tulyaganov, Dilshat U.; Pascual, María J.; Shaaban, E.R.; Muñoz, Francisco; Lü, Zhe; Ferreira, J.M.F.

doi:10.1016/j.jnoncrysol.2010.01.012

Cited by 37 publications

(41 citation statements)

References 22 publications

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“…The glass transition temperatures extracted from the DTA curves are in good agreement with those obtained from TMA. This would seem to indicate that particle migration for crystallization is easier in the Cr 2 O 3 containing glasses, which is consistent with its role as a network modifier [36]. However, this also means that the conductivity of this sample is the highest as shown in the Arrhenius plot presented in Fig.…”

Section: Effect Of Various Additives In the Bcabs Systemsupporting

confidence: 72%

“…Driven by the need for acceptable degradation behaviour in wet reducing and oxidizing environments, alkaline earth-boro-silicate based glasses are widely accepted as the choice for SOFC sealing [34][35][36]. However, long term stability, the interaction behaviour and wetting properties of the sealant with various SOFC components must be optimized.…”

Section: Effect Of Various Additives In the Bcabs Systemmentioning

confidence: 99%

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Some recent studies on glass/glass-ceramics for use as sealants with special emphasis for high temperature applications

et al. 2012

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Glass-ceramics owing to a combination of useful properties such as tuneable thermal expansion coefficient (TEC), good mechanical durability and chemical inertness find widespread uses in a variety of applications including seals and coatings. Glass-ceramic-to-metal seals have been fabricated with various silicate, phosphate and borate based oxide glasses depending upon the intended application. In this article, we review our studies on various glass and glass-ceramics materials development with a view to understand bonding behaviour with metals/alloys at ambient and high temperatures through a comprehensive structure property correlation investigations. Detail studies on BaO-CaO-Al 2 O 3 -B 2 O 3 -SiO 2 (BCABS), barium strontium alumino-silicate, and strontium alumino-silicate with different additives (like Nd 2 O 3 , La 2 O 3 , NiO, TiO 2 , V 2 O 5 , ZrO 2, Cr 2 O 3, and P 2 O 5 ) and barium/strontiun zinc silicate (B/SZS) glass-ceramics for high temperature sealing. We shall illustrate the role of various thermo-physical and structural characterization techniques that allowed optimum selection of materials and processing parameters. We particularly highlight the complementary role of NMR and XRD in studying the material at the short range and long range length scales.

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Section: Effect Of Various Additives In the Bcabs Systemsupporting

confidence: 72%

Section: Effect Of Various Additives In the Bcabs Systemmentioning

confidence: 99%

Some recent studies on glass/glass-ceramics for use as sealants with special emphasis for high temperature applications

et al. 2012

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“…Some compositions of glasses employed as sealants in SOFC are summarized in Table 2, and selected properties are provided in Table 3. Table 3 continued Glass code Metals commonly employed as interconnects in fuel cell designs include various austenitic and ferritic stainless steels, for example, Fe20Cr and FeCrAlY alloys, in addition to Ni-based superalloys, as summarized in [59][60][61][62][63][64][65][66][67][68][69][70][71][72][73][74], together with some BaO-free silicate glasses [74][75][76][77][78][79][80][81][82][83][84][85][86][87][88][89]. Low-silica and silica-free borate-based compositions have also been reported [90][91][92][93].…”

Section: Sofc Alloysmentioning

confidence: 99%

Recent developments in the preparation, characterization and applications of glass- and glass–ceramic-to-metal seals and coatings

et al. 2011

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There has, in recent years, been a major revival of interest in glass-and glass-ceramic-to-metal seals and coatings for new applications. Experience dictates that many factors need to be taken into consideration in the successful design and manufacture of high-quality seals, particularly if an adequate component lifetime is to be achieved. For example, during their preparation, undesirable reactions may occur between diffusing metal species and glass constituents, and these can lead to the formation of highly localized internal stresses, which can initiate failure of a seal either during manufacture or, more seriously, whilst in service due to the influence of static fatigue. In the case of high-temperature systems, reactions under hostile operating conditions also need to be taken into consideration. In this review, the factors learnt from past experience that influence the formation and lifetime behaviour of glass and glass-ceramic/metal systems are briefly introduced, and their relevance to the newer applications including solid oxide fuel cell sealants and coatings on titanium for biomedical applications is discussed.

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“…present study, sintering started ͑T FS ͒ at a temperature lower than other diopside based glass systems as reported in our previous studies. 38,39 However, the sinterability parameter, as defined by T c − T MS , 25 reflecting the sintering behavior of the glass composition is quiet low. It is evident that the investigated glass composition, even if well sintered, showed poorer sintering ability in comparison to its other diopside based counterparts.…”

Section: B Sintering and Crystallization Behaviors By Hsm And Dtamentioning

confidence: 99%

“…The T p value of 850°C obtained for the investigated glass heated at 5 K min −1 is much lower than the values presented by other diopside based glasses. 31,38,39 This difference can be attributed to the network modifier effect of Na 2 O and to the nucleating effect of Fe 2 O 3 unlike the network forming effect of Al 2 O 3 . 17 The relative nucleation rates for the investigated glass composition were calculated using the following equation: 40,41 …”

Section: B Sintering and Crystallization Behaviors By Hsm And Dtamentioning

confidence: 99%

Sintering and crystallization behavior of CaMgSi2O6–NaFeSi2O6 based glass-ceramics

Goel

Ferrari

Kansal

et al. 2009

Journal of Applied Physics

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We report on the synthesis, sintering, and crystallization behaviors of a glass with a composition corresponding to 90 mol % CaMgSi 2 O 6 − 10 mol % NaFeSi 2 O 6 . The investigated glass composition crystallized superficially immediately after casting of the melt and needs a high cooling rate ͑rapid quenching͒ in order to produce an amorphous glass. Differential thermal analysis and hot-stage microscopy were employed to investigate the glass forming ability, sintering behavior, relative nucleation rate, and crystallization behavior of the glass composition. The crystalline phase assemblage in the glass-ceramics was studied under nonisothermal heating conditions in the temperature range of 850-950°C in both air and N 2 atmosphere. X-ray diffraction studies adjoined with the Rietveld-reference intensity ratio method were employed to quantify the amount of crystalline phases, while electron microscopy was used to shed some light on the microstructure of the resultant glass-ceramics. Well sintered glass-ceramics with diopside as the primary crystalline phase were obtained where the amount of diopside varied with the heating conditions.

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Development and performance of diopside based glass-ceramic sealants for solid oxide fuel cells

Cited by 37 publications

References 22 publications

Some recent studies on glass/glass-ceramics for use as sealants with special emphasis for high temperature applications

Some recent studies on glass/glass-ceramics for use as sealants with special emphasis for high temperature applications

Recent developments in the preparation, characterization and applications of glass- and glass–ceramic-to-metal seals and coatings

Sintering and crystallization behavior of CaMgSi2O6–NaFeSi2O6 based glass-ceramics

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