Aqueous tape casting of micro and nano YSZ for SOFC electrolytes

Baquero, Tomás; Escobar, Jairo Arturo; Frade, J.R.; Hotza, Dachamir

doi:10.1016/j.ceramint.2013.03.097

Cited by 41 publications

(15 citation statements)

References 13 publications

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“…The water based suspensions are more sensitive for the operating conditions, than the organic. This behaviour was observed in several other cases [14,16,20], which affects them from being used in a wider range of applications.…”

Section: Processing Conditionsmentioning

confidence: 77%

“…The lower relative density of green tapes and presence of agglomerates was the explanation of these results [14,16]. On the other hand it is the non-compatibility of the water based system, which hinders the densification rate.…”

Section: Sintering and Microstructure Of Samplesmentioning

confidence: 87%

“…However, in the case of laminated W_YSZ, insufficient de-airing of the W_YSZ suspension, appearance of few agglomerated particles and In the study of aqueous tape casting of micro-and nano-YSZ by Baquero et al [14] the same sintering temperature was used (1600°C) and a dwell time of up to 3 h. Despite the longer sintering time, the final relative density was just~95%. The lower relative density of green tapes and presence of agglomerates was the explanation of these results [14,16].…”

Section: Sintering and Microstructure Of Samplesmentioning

confidence: 98%

“…However, some drawbacks or challenges in water based processing, still prevent it from being utilized in a wider range of production. Slower drying rates, high dielectric constant of H 2 O, warping during sintering [14,16] and not always published know-how are the critical points that have to be overcome. Therefore, the alcohol suspensions with its benefits are still often preferred [10,[17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…In recent years a great effort of research is being focused on water based solvents [13][14][15], for its environmental benefits in comparison to the "traditional" non-aqueous production. However, some drawbacks or challenges in water based processing, still prevent it from being utilized in a wider range of production.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of aqueous and non-aqueous tape casting of fully stabilized ZrO2 suspensions

et al. 2015

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Section: Processing Conditionsmentioning

confidence: 77%

Section: Sintering and Microstructure Of Samplesmentioning

confidence: 87%

Section: Sintering and Microstructure Of Samplesmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Comparison of aqueous and non-aqueous tape casting of fully stabilized ZrO2 suspensions

et al. 2015

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Tape casting of preceramic polymers toward advanced ceramics: A review

Hotza

Nishihora

Machado

et al. 2019

Int J Ceramic Engine & Sci

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In the last 20 years, tape casting, a standard wet‐shaping process to produce thin ceramics, has been applied to manufacture polymer‐derived ceramics (PDCs). Si‐based polymers, such as polysiloxanes and polysilazanes, also known as preceramic polymers (PCPs), have been used as precursors/binders replacing conventional raw materials and additives for tape casting process. Thermal processing of PCPs is carried out at lower temperatures in comparison with classical ceramic sintering, particularly of carbides and nitrides. Furthermore, polymeric precursors can be converted into hybrid or composite ceramics, when parts of the polymers remain unreacted. Inert or reactive fillers might be used to reduce both shrinkage and porosity inherently caused by the weight loss occurring during polymer pyrolysis while forming new ceramic phases in the final materials. Alternatively, pore formers might also be added to tailor pore shape, connectivity, and volume (macroporosity). Nevertheless, current equipment and process parameters for tape casting‐based products must be eventually adjusted to fit the characteristics of ceramic precursors. Therefore, the aim of this review is focused on listing and discussing the efforts to produce PDCs using tape casting as a shaping technique. Interactions of system components and effects of treatment, particularly thermal stages, on final microstructure and properties are stressed out. Gaps in the literature concerning processing optimization are pointed out, and suggestions are given for further development of PDCs produced by tape casting.

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Planar Solid Oxide Fuel Cell Fabricated by Aqueous Reverse Sequential Tape‐Casting of the Anode, Electrolyte, and Barrier Layer

et al. 2023

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A low‐cost manufacturing procedure has been developed for the fabrication of planar anode‐supported solid oxide fuel cell including only two thermal treatments. This method is also environmental friendly because slurries are water based and use nontoxic additives. Slurries are formulated by optimizing the powder quantity, by minimizing the organic compounds while controlling their stabilities and their rheological properties. Flexible multilayer green tapes have been produced by using the reverse sequential tape‐casting method. After a cosintering thermal treatment under loads, planar anodic half‐cells have been produced allowing the deposition of a La2NiO4+δ cathode by screen printing. After the final consolidation thermal treatment, the cell presents a 30 μm‐thick porous cathode, a 530 μm‐thick NiO‐YSZ porous anode, and a 80 μm‐thick dense electrolyte with a gradient of composition: 10GDC on the cathode side to prevent the apparition of the La2Zr2O7 insulating phase and 8YSZ on the anode side to avoid the reduction of 10GDC with the fuel gas. Power densities present promising performances (319 mW cm−2 at 830 °C) given that electrolyte thickness and electrochemical system measurement may be improved.

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Aqueous tape casting of micro and nano YSZ for SOFC electrolytes

Cited by 41 publications

References 13 publications

Comparison of aqueous and non-aqueous tape casting of fully stabilized ZrO2 suspensions

Comparison of aqueous and non-aqueous tape casting of fully stabilized ZrO2 suspensions

Tape casting of preceramic polymers toward advanced ceramics: A review

Planar Solid Oxide Fuel Cell Fabricated by Aqueous Reverse Sequential Tape‐Casting of the Anode, Electrolyte, and Barrier Layer

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