Role of sintering temperature on thermal, electrical and structural properties of Y2Ti2O7 pyrochlores

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

doi:10.1016/j.ijhydene.2011.02.138

Role of sintering temperature on thermal, electrical and structural properties of Y₂Ti₂O₇ pyrochlores

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

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

25 Scopus citations

Abstract

Pyrochlores exhibit variety of properties which can be tailored by changing the processing conditions. In the present study, the sintering characteristics, thermal expansion coefficient, crystal structure and conductivity behavior of pyrochlores have been studied for different applications. It was observed that sintering at 1550 °C for 12 h exhibits more oxygen deficient YTiO _2.085 phase which shows two order of magnitudes higher conductivity than Y₂Ti₂O₇ phase. The conductivity enhancement in YTiO_2.085 sample is attributed to higher oxygen deficiency which may be created due to transformation of Ti⁴⁺ to Ti³⁺ at low oxygen pressure.

Original language	English
Pages (from-to)	14943-14947
Number of pages	5
Journal	International Journal of Hydrogen Energy
Volume	36
Issue number	22
DOIs	https://doi.org/10.1016/j.ijhydene.2011.02.138
State	Published - Nov 2011
Externally published	Yes

Keywords

Ceramics
Crystal structure
Defects
Electrical properties
Sintering
Thermal properties
X-ray techniques

Access to Document

10.1016/j.ijhydene.2011.02.138

Cite this

@article{1590d6b5ec9c42cf846bf0e430dd7b94,

title = "Role of sintering temperature on thermal, electrical and structural properties of Y2Ti2O7 pyrochlores",

abstract = "Pyrochlores exhibit variety of properties which can be tailored by changing the processing conditions. In the present study, the sintering characteristics, thermal expansion coefficient, crystal structure and conductivity behavior of pyrochlores have been studied for different applications. It was observed that sintering at 1550 °C for 12 h exhibits more oxygen deficient YTiO 2.085 phase which shows two order of magnitudes higher conductivity than Y2Ti2O7 phase. The conductivity enhancement in YTiO2.085 sample is attributed to higher oxygen deficiency which may be created due to transformation of Ti4+ to Ti3+ at low oxygen pressure.",

keywords = "Ceramics, Crystal structure, Defects, Electrical properties, Sintering, Thermal properties, X-ray techniques",

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

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

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doi = "10.1016/j.ijhydene.2011.02.138",

language = "English",

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AU - Gill, Jasmeet Kaur

AU - Pandey, O. P.

AU - Singh, K.

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

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AB - Pyrochlores exhibit variety of properties which can be tailored by changing the processing conditions. In the present study, the sintering characteristics, thermal expansion coefficient, crystal structure and conductivity behavior of pyrochlores have been studied for different applications. It was observed that sintering at 1550 °C for 12 h exhibits more oxygen deficient YTiO 2.085 phase which shows two order of magnitudes higher conductivity than Y2Ti2O7 phase. The conductivity enhancement in YTiO2.085 sample is attributed to higher oxygen deficiency which may be created due to transformation of Ti4+ to Ti3+ at low oxygen pressure.

KW - Ceramics

KW - Crystal structure

KW - Defects

KW - Electrical properties

KW - Sintering

KW - Thermal properties

KW - X-ray techniques

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