Determination of grain boundary conductivity using distribution function of relaxation times (DFRT) analysis at room temperature in 10 mol% Gd doped ceria: A non-classical electrostrictor

Tanmoy Paul, Nimrod Yavo, Igor Lubomirsky, Yoed Tsur

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The electrical conductivity of Ce0.90Gd0.10O1.95 oxide ion conductor is studied, emphasizing distribution function of relaxation times (DFRT) analysis of impedance spectroscopy measurements. The corresponding powder has been prepared by co-precipitation method and sintered at 1300 °C. The formation of the fluorite phase is confirmed by X-ray diffraction. The temperature dependence of ionic conductivity has been studied at different bias voltages. The impedance spectra are analysed by impedance spectroscopy genetic programming (ISGP) that finds an analytic form of the DFRT. Interestingly, both the grain and grain boundary conductivities can be identified at room temperature by analysing the DFRTs. At higher temperatures and higher bias voltages, the grain boundary diffusion process of oxygen ions is identified. Both the grain and grain boundary activation energies are bias independent.

Original languageEnglish
Pages (from-to)18-21
Number of pages4
JournalSolid State Ionics
Volume331
DOIs
Publication statusPublished - Mar 1 2019

Fingerprint

Cerium compounds
Relaxation time
Distribution functions
Grain boundaries
grain boundaries
relaxation time
distribution functions
impedance
Bias voltage
conductivity
room temperature
Spectroscopy
Ions
Fluorspar
Genetic programming
fluorite
electric potential
Ionic conductivity
Coprecipitation
oxygen ions

Keywords

  • DFRT
  • Doped ceria
  • Grain boundary properties
  • Impedance spectroscopy

ASJC Scopus subject areas

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

Cite this

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title = "Determination of grain boundary conductivity using distribution function of relaxation times (DFRT) analysis at room temperature in 10 mol{\%} Gd doped ceria: A non-classical electrostrictor",
abstract = "The electrical conductivity of Ce0.90Gd0.10O1.95 oxide ion conductor is studied, emphasizing distribution function of relaxation times (DFRT) analysis of impedance spectroscopy measurements. The corresponding powder has been prepared by co-precipitation method and sintered at 1300 °C. The formation of the fluorite phase is confirmed by X-ray diffraction. The temperature dependence of ionic conductivity has been studied at different bias voltages. The impedance spectra are analysed by impedance spectroscopy genetic programming (ISGP) that finds an analytic form of the DFRT. Interestingly, both the grain and grain boundary conductivities can be identified at room temperature by analysing the DFRTs. At higher temperatures and higher bias voltages, the grain boundary diffusion process of oxygen ions is identified. Both the grain and grain boundary activation energies are bias independent.",
keywords = "DFRT, Doped ceria, Grain boundary properties, Impedance spectroscopy",
author = "Tanmoy Paul and Nimrod Yavo and Igor Lubomirsky and Yoed Tsur",
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TY - JOUR

T1 - Determination of grain boundary conductivity using distribution function of relaxation times (DFRT) analysis at room temperature in 10 mol% Gd doped ceria

T2 - A non-classical electrostrictor

AU - Paul, Tanmoy

AU - Yavo, Nimrod

AU - Lubomirsky, Igor

AU - Tsur, Yoed

PY - 2019/3/1

Y1 - 2019/3/1

N2 - The electrical conductivity of Ce0.90Gd0.10O1.95 oxide ion conductor is studied, emphasizing distribution function of relaxation times (DFRT) analysis of impedance spectroscopy measurements. The corresponding powder has been prepared by co-precipitation method and sintered at 1300 °C. The formation of the fluorite phase is confirmed by X-ray diffraction. The temperature dependence of ionic conductivity has been studied at different bias voltages. The impedance spectra are analysed by impedance spectroscopy genetic programming (ISGP) that finds an analytic form of the DFRT. Interestingly, both the grain and grain boundary conductivities can be identified at room temperature by analysing the DFRTs. At higher temperatures and higher bias voltages, the grain boundary diffusion process of oxygen ions is identified. Both the grain and grain boundary activation energies are bias independent.

AB - The electrical conductivity of Ce0.90Gd0.10O1.95 oxide ion conductor is studied, emphasizing distribution function of relaxation times (DFRT) analysis of impedance spectroscopy measurements. The corresponding powder has been prepared by co-precipitation method and sintered at 1300 °C. The formation of the fluorite phase is confirmed by X-ray diffraction. The temperature dependence of ionic conductivity has been studied at different bias voltages. The impedance spectra are analysed by impedance spectroscopy genetic programming (ISGP) that finds an analytic form of the DFRT. Interestingly, both the grain and grain boundary conductivities can be identified at room temperature by analysing the DFRTs. At higher temperatures and higher bias voltages, the grain boundary diffusion process of oxygen ions is identified. Both the grain and grain boundary activation energies are bias independent.

KW - DFRT

KW - Doped ceria

KW - Grain boundary properties

KW - Impedance spectroscopy

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