Fabrication of electrolyte materials for solid oxide fuel cells by tape-casting

Timakul, Patthamaporn; Jinawath, Supatra; Aungkavattana, Pavadee

doi:10.1016/j.ceramint.2007.09.038

Cited by 42 publications

(16 citation statements)

References 3 publications

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“…Specimens were made based on tape casting and multilayer planar ceramic technologies through sintering of 4.5 mol% Y2O3, 9.4 mol% Al2O3, and zirconia (balance), as electrolyte [13][14][15][16]. The microstructure was examined by scanning electron microscopy (SEM) (ESEM Quanta 200 FEI), transmission electron microscopy (TEM) (Hitachi 800MT, 300 kV) and high resolution transmission electron microscopy (HRTEM) (JEOL JEM 2100, 200 kV).…”

Section: Methodsmentioning

confidence: 99%

Phase transformation studies on YSZ doped with alumina. Part 2: Yttria segregation

Nazarpour¹,

López-Gándara²,

Zamani³

et al. 2010

Journal of Alloys and Compounds

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Section: Methodsmentioning

confidence: 99%

Phase transformation studies on YSZ doped with alumina. Part 2: Yttria segregation

Nazarpour¹,

López-Gándara²,

Zamani³

et al. 2010

Journal of Alloys and Compounds

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“…Tape casting is a low cost thin ceramic film fabrication technique which can be used to produce wide and smooth films with precise dimensional tolerances and high production rate. According to these advantages, many investigators have employed this technique to fabricate YSZ solid electrolyte and the other fuel cell components and stack [14,15]. 8YSZ is the most common electrolyte materials used in SOFCs but its low mechanical strength limit their application in thin film forms.…”

Section: Introductionmentioning

confidence: 99%

Electrical and mechanical properties of 25 wt% tetragonal/cubic zirconia based composite thin films prepared by combination of aqueous tape casting and net shape methods

Ghatee

Salihi

2015

J Electroceram

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Yttria doped zirconia based are the most important solid electrolytes for high temperature solid oxide fuel cell application. In this study, the tetragonal/cubic zirconia composite thin films are prepared by combination of aqueous tape casting and net shape method. The phases and microstructure of the samples are studied by X-ray diffraction and scanning electron microscope respectively. The microhardenss and toughness of thin films are measured by Vickers microhardness test. The nanohardness and Young's modulus of the specimens are evaluated by nanoindentation method. The electrical conductivity is determined by electrochemical impedance spectroscopy method. It is found that the composite electrolyte with 25 wt% of tetragonal phase content has improved mechanical and electrical properties at low temperatures and can be a suitable electrolyte for intermediate temperature solid oxide fuel cells.

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“…The pellets were sintered for t = 20 h at 1773 K to a final density 90 % of the theoretical. The Y 2 O 3 partially stabilized ZrO 2 with tetragonal precipitates was selected as insulation material for the good thermal shock resistance, high fracture toughness as well as resistance to wear and ageing it shows [16,17] because of transformation toughening phenomena, resulting from the tetragonal to [18]. All substrates were polished to a final roughness of 1 lm.…”

Section: Methodsmentioning

confidence: 99%

Wetting and interactions of Ag–Cu–Ti and Ag–Cu–Ni alloys with ceramic and steel substrates for use as sealing materials in a DCFC stack

Triantafyllou

Irvine

2015

J Mater Sci

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Ag and Ag-based pseudo-alloys were evaluated in terms of application as metal brazes for the use in a hybrid direct carbon fuel cell stack. This paper reports on a series of wetting experiments on systems of pure Ag as well as Ag-Cu-Ti and Ag-Cu-Ni pseudo-alloys in contact with the widely used austenitic stainless steel SS316L, the ferritic steels Crofer22APU and Croffer22H and with polycrystalline partially stabilized zirconia (TZ-3Y) for the determination of the interfacial properties of the above systems. Pure Ag in air showed poor wettability (h [ 90°) with all substrates. The Ag-Cu-Ti pseudo-alloy in vacuum (P = 2.5 9 10 -3 mbar) showed improved wettability, with h & 40°for the steels and h & 50°for the TZ-3Y substrates. The Ag-Cu-Ni pseudo-alloy in air showed excellent wetting properties (h \ 10°) with all the substrates, but its high liquidus temperature makes it unsuitable for use with the SS316L steel. In low vacuum (P = 1.5 9 10 -1 mbar), the contact angle was increased (h & 65°) but the low oxygen concentration limits the oxidation of the steel surface. Selected systems of the pseudo-alloys in contact with steel and TZ-3Y substrates were treated for 120 h in the operating conditions of a hybrid direct carbon fuel cell, in order to evaluate the thermal stability of the joints. Despite the reactions taking place on the interface, the joints showed good stability and no separation of the two phases occurred.

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Fabrication of electrolyte materials for solid oxide fuel cells by tape-casting

Cited by 42 publications

References 3 publications

Phase transformation studies on YSZ doped with alumina. Part 2: Yttria segregation

Phase transformation studies on YSZ doped with alumina. Part 2: Yttria segregation

Electrical and mechanical properties of 25 wt% tetragonal/cubic zirconia based composite thin films prepared by combination of aqueous tape casting and net shape methods

Wetting and interactions of Ag–Cu–Ti and Ag–Cu–Ni alloys with ceramic and steel substrates for use as sealing materials in a DCFC stack

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