Thermodynamic vaporization studies of the manganese oxide–yttria stabilized zirconia (YSZ) solid solution

Matraszek, Aleksandra; Miller, M.; Singheiser, L.; Hilpert, K.

doi:10.1016/j.jeurceramsoc.2003.09.015

Cited by 22 publications

(24 citation statements)

References 22 publications

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“…X-ray diffraction of deposits formed after long exposures confirm the formation of the spinel phase [18]. The source of manganese is the LSM cathode, but the mechanism by which the manganese Mn [53,54] See Figure 1 [11,16,17] is transported from the cathode is not clear. Fig.…”

Section: Effect Of Electrolyte Transport Propertiesmentioning

confidence: 99%

“…Fig. 5 [53][54][55] shows that vapor pressures of manganese-containing species are low, so gas-phase transport seems unlikely.…”

Section: Effect Of Electrolyte Transport Propertiesmentioning

confidence: 99%

“…At high temperatures (1300-1400 • C), 8-12% MnO can dissolve in YSZ [53,56,57]. Although the solubility limit at temperatures more typical of SOFC operation is lower (e.g.…”

Section: Effect Of Electrolyte Transport Propertiesmentioning

confidence: 99%

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Effect of cathode and electrolyte transport properties on chromium poisoning in solid oxide fuel cells

Fergus

2007

International Journal of Hydrogen Energy

260

128

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Section: Effect Of Electrolyte Transport Propertiesmentioning

confidence: 99%

“…Fig. 5 [53][54][55] shows that vapor pressures of manganese-containing species are low, so gas-phase transport seems unlikely.…”

Section: Effect Of Electrolyte Transport Propertiesmentioning

confidence: 99%

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Effect of cathode and electrolyte transport properties on chromium poisoning in solid oxide fuel cells

Fergus

2007

International Journal of Hydrogen Energy

260

128

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“…The vapor species condense outside of the furnace. A well defined humidity is adjusted by the flow of the carrier gas through a bubble humidifier (6) and a condenser (8), which is cooled by a thermostat. Rh was used as internal standard.…”

Section: Transpiration Methodsmentioning

confidence: 99%

“…In previous works, the long term stability of YSZ was investigated by studies of the solubility of cathode elements in YSZ [8], their thermodynamic activity in YSZ, and cation diffusion in YSZ [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Vaporization and Diffusion Studies on the Stability of Doped Lanthanum Gallates

et al. 2006

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Vaporization and diffusion determine the stability of doped lanthanum gallates under SOFC operating conditions. Systematic vaporization studies of Ga and other elements were carried out using the vapor transpiration method. It was shown that the Ga vaporization is controlled by diffusion from the bulk to the surface. Diffusion coefficients DGa and vaporization coefficients αGa were determined by fitting the measured vaporization data to a vaporization model. Secondary phases formed as a result of the vaporization were detected. The influence of different doping levels of Sr, Mg and Fe on the Ga vaporization was elucidated. Moreover, cation self‐diffusion of 139La, 84Sr and 25Mg as well as cation impurity diffusion of 144Nd, 89Y and 56Fe in polycrystalline samples of doped lanthanum gallate were directly determined for the composition La0.9Sr0.1Ga0.9Mg0.1O2.9 as an example, from diffusion profiles determined by SIMS. It was found that diffusion occurs by means of bulk and grain boundaries. The bulk diffusion coefficients are similar for all cations with activation energies which are strongly dependent on temperature. The results are explained by a frozen‐in defect structure at low temperatures in the ABO3 perovskite lattice and by proposing a defect cluster containing cation vacancies in the A and B sublattices, as well as oxygen vacancies.

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Co-synthesis of nano-sized LSM–YSZ composites with enhanced electrochemical property

Kim

Song

Kim

et al. 2007

J Solid State Electrochem

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Thermodynamic vaporization studies of the manganese oxide–yttria stabilized zirconia (YSZ) solid solution

Cited by 22 publications

References 22 publications

Effect of cathode and electrolyte transport properties on chromium poisoning in solid oxide fuel cells

Effect of cathode and electrolyte transport properties on chromium poisoning in solid oxide fuel cells

Vaporization and Diffusion Studies on the Stability of Doped Lanthanum Gallates

Co-synthesis of nano-sized LSM–YSZ composites with enhanced electrochemical property

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