Studies on structural, morphological and electrical properties of Ce1-xGdxO2-(x/2)

M. G. Chourashiya, J. Y. Patil, S. H. Pawar, L. D. Jadhav*

*Kontaktforfatter for dette arbejde

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Resumé

The gadolinium-doped ceria (GDC) is considered as one of the most promising electrolytes for intermediate temperature solid oxide fuel cells (IT-SOFCs). Since the operating temperature of SOFC mainly depends on properties of electrolytes, the structural, morphological and electrical properties of GDC are studied as a function of concentration of 'Gd' and sintering temperature. The lattice parameter, density, surface morphology and conductivity of GDC samples are improved upon sintering. Further an increase in lattice parameter with concentration of Gd confirms the dissolution of Gd2O3 in CeO2. The crystallite size and grain size was observed to decrease with "Gd" concentration. All GDC samples sintered at 1773 K showed uniform and smoother surfaces with conductivity ∼0.1 S cm-1 at 1023 K and activation energies less than 0.9 eV. An impedance study confirms the formation of well-grown grains at higher sintering temperature.

OriginalsprogEngelsk
TidsskriftMaterials Chemistry and Physics
Vol/bind109
Udgave nummer1
Sider (fra-til)39-44
Antal sider6
ISSN0254-0584
DOI
StatusUdgivet - 15. maj 2008

Fingeraftryk

Gadolinium
Cerium compounds
gadolinium
Structural properties
Electric properties
electrical properties
sintering
Sintering
Solid oxide fuel cells (SOFC)
Electrolytes
Lattice constants
lattice parameters
electrolytes
conductivity
Temperature
solid oxide fuel cells
Crystallite size
operating temperature
Surface morphology
temperature

Citer dette

Chourashiya, M. G. ; Patil, J. Y. ; Pawar, S. H. ; Jadhav, L. D. / Studies on structural, morphological and electrical properties of Ce1-xGdxO2-(x/2). I: Materials Chemistry and Physics. 2008 ; Bind 109, Nr. 1. s. 39-44.
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abstract = "The gadolinium-doped ceria (GDC) is considered as one of the most promising electrolytes for intermediate temperature solid oxide fuel cells (IT-SOFCs). Since the operating temperature of SOFC mainly depends on properties of electrolytes, the structural, morphological and electrical properties of GDC are studied as a function of concentration of 'Gd' and sintering temperature. The lattice parameter, density, surface morphology and conductivity of GDC samples are improved upon sintering. Further an increase in lattice parameter with concentration of Gd confirms the dissolution of Gd2O3 in CeO2. The crystallite size and grain size was observed to decrease with {"}Gd{"} concentration. All GDC samples sintered at 1773 K showed uniform and smoother surfaces with conductivity ∼0.1 S cm-1 at 1023 K and activation energies less than 0.9 eV. An impedance study confirms the formation of well-grown grains at higher sintering temperature.",
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Studies on structural, morphological and electrical properties of Ce1-xGdxO2-(x/2). / Chourashiya, M. G.; Patil, J. Y.; Pawar, S. H.; Jadhav, L. D.

I: Materials Chemistry and Physics, Bind 109, Nr. 1, 15.05.2008, s. 39-44.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Studies on structural, morphological and electrical properties of Ce1-xGdxO2-(x/2)

AU - Chourashiya, M. G.

AU - Patil, J. Y.

AU - Pawar, S. H.

AU - Jadhav, L. D.

PY - 2008/5/15

Y1 - 2008/5/15

N2 - The gadolinium-doped ceria (GDC) is considered as one of the most promising electrolytes for intermediate temperature solid oxide fuel cells (IT-SOFCs). Since the operating temperature of SOFC mainly depends on properties of electrolytes, the structural, morphological and electrical properties of GDC are studied as a function of concentration of 'Gd' and sintering temperature. The lattice parameter, density, surface morphology and conductivity of GDC samples are improved upon sintering. Further an increase in lattice parameter with concentration of Gd confirms the dissolution of Gd2O3 in CeO2. The crystallite size and grain size was observed to decrease with "Gd" concentration. All GDC samples sintered at 1773 K showed uniform and smoother surfaces with conductivity ∼0.1 S cm-1 at 1023 K and activation energies less than 0.9 eV. An impedance study confirms the formation of well-grown grains at higher sintering temperature.

AB - The gadolinium-doped ceria (GDC) is considered as one of the most promising electrolytes for intermediate temperature solid oxide fuel cells (IT-SOFCs). Since the operating temperature of SOFC mainly depends on properties of electrolytes, the structural, morphological and electrical properties of GDC are studied as a function of concentration of 'Gd' and sintering temperature. The lattice parameter, density, surface morphology and conductivity of GDC samples are improved upon sintering. Further an increase in lattice parameter with concentration of Gd confirms the dissolution of Gd2O3 in CeO2. The crystallite size and grain size was observed to decrease with "Gd" concentration. All GDC samples sintered at 1773 K showed uniform and smoother surfaces with conductivity ∼0.1 S cm-1 at 1023 K and activation energies less than 0.9 eV. An impedance study confirms the formation of well-grown grains at higher sintering temperature.

KW - Electrical conductivity

KW - Electron microscopy

KW - Oxides

KW - Sintering

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DO - 10.1016/j.matchemphys.2007.10.028

M3 - Journal article

VL - 109

SP - 39

EP - 44

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

SN - 0254-0584

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