Proton conduction in La0.6Ba0.4ScO2.8 cubic perovskite

Shin Kim; Kyu Hyoung Lee; Hong Lim Lee

doi:10.1016/S0167-2738(01)00887-6

Proton conduction in La_0.6Ba_0.4ScO_2.8 cubic perovskite

Shin Kim, Kyu Hyoung Lee, Hong Lim Lee

Department of Materials Science and Engineering

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

21 Citations (Scopus)

Abstract

The proton conduction in single phase La_0.6Ba_0.4ScO_2.8 with a cubic perovskite structure was studied. The endothermic peak in differential thermal analysis (DTA) curve and the weight loss in thermal gravimetric analysis (TGA) one for as-sintered sample were observed between 340 and 410 °C during the heating process in dry N₂ atmosphere. These results were due to the dehydration of the water, which might have been incorporated into oxygen vacancies during the cooling process after sintering. In wet N₂ atmosphere (p_H(2)O=6.1 hPa), a plateau of the conductivity data was observed between 450 and 300 °C in the plot of log(σT) versus the reciprocal temperature while the conductivity data measured in dry atmosphere decreased linearly over the measured temperature range, implying that proton conduction was dominant below 450 °C.

Original language	English
Pages (from-to)	109-115
Number of pages	7
Journal	Solid State Ionics
Volume	144
Issue number	1-2
DOIs	https://doi.org/10.1016/S0167-2738(01)00887-6
Publication status	Published - 2001 Sept 1

Bibliographical note

Funding Information:
This work was supported in part by the Korea Science and Engineering Foundation through the Ceramic Processing Research Center (CPRC) at Hanyang University.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

Access to Document

10.1016/S0167-2738(01)00887-6

Cite this

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title = "Proton conduction in La0.6Ba0.4ScO2.8 cubic perovskite",

abstract = "The proton conduction in single phase La0.6Ba0.4ScO2.8 with a cubic perovskite structure was studied. The endothermic peak in differential thermal analysis (DTA) curve and the weight loss in thermal gravimetric analysis (TGA) one for as-sintered sample were observed between 340 and 410 °C during the heating process in dry N2 atmosphere. These results were due to the dehydration of the water, which might have been incorporated into oxygen vacancies during the cooling process after sintering. In wet N2 atmosphere (pH(2)O=6.1 hPa), a plateau of the conductivity data was observed between 450 and 300 °C in the plot of log(σT) versus the reciprocal temperature while the conductivity data measured in dry atmosphere decreased linearly over the measured temperature range, implying that proton conduction was dominant below 450 °C.",

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