Ionic conductivity, structural and thermal properties of Ca 2+ doped Y 2Ti 2O 7 pyrochlores for SOFC

Jasmeet Kaur Gill; O. P. Pandey; K. Singh

doi:10.1016/j.ijhydene.2011.04.216

Ionic conductivity, structural and thermal properties of Ca ²⁺ doped Y ₂Ti ₂O ₇ pyrochlores for SOFC

Jasmeet Kaur Gill, O. P. Pandey, K. Singh

Research output: Contribution to journal › Article › peer-review

40 Scopus citations

Abstract

Yttrium titanate Y ₂Ti ₂O ₇ is an important member of the pyrochlore family because it exhibits various properties which make it suitable for potential applications in different fields. In the present study, influence of doping of CaO (0.1 ≤ x ≤ 0.4) for Y ₂Ti ₂O ₇ system was investigated. The lattice parameter, electrical conductivity, X-ray analysis, Fourier Transform-Infrared Spectroscopy (FTIR) and thermal expansion coefficient (TEC) were obtained in-order to study its suitability in the field of Solid Oxide Fuel Cells. The results show that doping of Ca ion on the Y-site plays an important role to determine electrical, thermal as well as structural properties. Moreover, it was observed that sintering up to 1550 °C for 12 h results in the formation of single Y ₂Ti ₂O ₇ cubic pyrochlore phase. In addition to this, structural studies including both SEM/EDX analysis were done to determine grain size as well as porosity in the system.

Original language	English
Pages (from-to)	3857-3864
Number of pages	8
Journal	International Journal of Hydrogen Energy
Volume	37
Issue number	4
DOIs	https://doi.org/10.1016/j.ijhydene.2011.04.216
State	Published - Feb 2012
Externally published	Yes

Keywords

Doping
Electrical conductivity
Pyrochlore
SEM
Thermal expansion coefficient
X-ray analysis

Access to Document

10.1016/j.ijhydene.2011.04.216

Cite this

@article{be3b09ff9ac54fa4b4425d63a4116044,

title = "Ionic conductivity, structural and thermal properties of Ca 2+ doped Y 2Ti 2O 7 pyrochlores for SOFC",

abstract = "Yttrium titanate Y 2Ti 2O 7 is an important member of the pyrochlore family because it exhibits various properties which make it suitable for potential applications in different fields. In the present study, influence of doping of CaO (0.1 ≤ x ≤ 0.4) for Y 2Ti 2O 7 system was investigated. The lattice parameter, electrical conductivity, X-ray analysis, Fourier Transform-Infrared Spectroscopy (FTIR) and thermal expansion coefficient (TEC) were obtained in-order to study its suitability in the field of Solid Oxide Fuel Cells. The results show that doping of Ca ion on the Y-site plays an important role to determine electrical, thermal as well as structural properties. Moreover, it was observed that sintering up to 1550 °C for 12 h results in the formation of single Y 2Ti 2O 7 cubic pyrochlore phase. In addition to this, structural studies including both SEM/EDX analysis were done to determine grain size as well as porosity in the system.",

keywords = "Doping, Electrical conductivity, Pyrochlore, SEM, Thermal expansion coefficient, X-ray analysis",

author = "Gill, {Jasmeet Kaur} and Pandey, {O. P.} and K. Singh",

note = "Funding Information: Authors are grateful to the University Grants Commission (UGC), New Delhi, India for providing financial assistance (letter no. 34-1 (Pun) SR dated 30/12/2008).",

year = "2012",

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doi = "10.1016/j.ijhydene.2011.04.216",

language = "English",

volume = "37",

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AU - Gill, Jasmeet Kaur

AU - Pandey, O. P.

AU - Singh, K.

N1 - Funding Information: Authors are grateful to the University Grants Commission (UGC), New Delhi, India for providing financial assistance (letter no. 34-1 (Pun) SR dated 30/12/2008).

PY - 2012/2

Y1 - 2012/2

N2 - Yttrium titanate Y 2Ti 2O 7 is an important member of the pyrochlore family because it exhibits various properties which make it suitable for potential applications in different fields. In the present study, influence of doping of CaO (0.1 ≤ x ≤ 0.4) for Y 2Ti 2O 7 system was investigated. The lattice parameter, electrical conductivity, X-ray analysis, Fourier Transform-Infrared Spectroscopy (FTIR) and thermal expansion coefficient (TEC) were obtained in-order to study its suitability in the field of Solid Oxide Fuel Cells. The results show that doping of Ca ion on the Y-site plays an important role to determine electrical, thermal as well as structural properties. Moreover, it was observed that sintering up to 1550 °C for 12 h results in the formation of single Y 2Ti 2O 7 cubic pyrochlore phase. In addition to this, structural studies including both SEM/EDX analysis were done to determine grain size as well as porosity in the system.

AB - Yttrium titanate Y 2Ti 2O 7 is an important member of the pyrochlore family because it exhibits various properties which make it suitable for potential applications in different fields. In the present study, influence of doping of CaO (0.1 ≤ x ≤ 0.4) for Y 2Ti 2O 7 system was investigated. The lattice parameter, electrical conductivity, X-ray analysis, Fourier Transform-Infrared Spectroscopy (FTIR) and thermal expansion coefficient (TEC) were obtained in-order to study its suitability in the field of Solid Oxide Fuel Cells. The results show that doping of Ca ion on the Y-site plays an important role to determine electrical, thermal as well as structural properties. Moreover, it was observed that sintering up to 1550 °C for 12 h results in the formation of single Y 2Ti 2O 7 cubic pyrochlore phase. In addition to this, structural studies including both SEM/EDX analysis were done to determine grain size as well as porosity in the system.

KW - Doping

KW - Electrical conductivity

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KW - SEM

KW - Thermal expansion coefficient

KW - X-ray analysis

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