Effect of sintering temperature on the microstructure and ionic conductivity of Ce0.8Sm0.1Ba0.1O2-δ electrolyte

Mustafa Anwar, S. A. Muhammed Ali, Abdalla M. Abdalla, Mahendra Rao Somalu, Andanastuti Muchtar

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

This study investigated the effects of sintering temperature on the microstructure and ionic conductivity of codoped ceria electrolyte with barium and samarium as dopants. The electrolyte (Ce0.8Sm0.1Ba0.1O2-δ) powder was synthesized using the citric acid-nitrate combustion method and calcined at 900°C for 5 h. The calcined electrolyte exhibited a cubic fluorite crystal structure with some impurity phases. The calcined powder was then pressed into cylindrical pellets using uniaxial die-pressing. The pellets were sintered at three different temperatures, i.e., 1200, 1300 and 1400°C for 5 h. Microstructural analysis of the pellets showed that the average grain size increased with the increase in sintering temperature. The sintered densities of the pellets were measured by Archimedes' method, and the relative density values were within the range of 78 %TD to 87 %TD as the sintering temperature increased from 1200 to 1400°C. Electrochemical impedance spectroscopy analysis showed that conductivity increased with the increase in sintering temperature, but no considerable change in conductivity was observed for the pellets sintered at 1300 and 1400°C. The results revealed that the electrolyte pellet sintered at 1300°C exhibited the ionic conductivity of 0.005 S/cm with lowest activation energy of 0.7275 eV.

Original languageEnglish
Pages (from-to)67-74
Number of pages8
JournalProcessing and Application of Ceramics
Volume11
Issue number1
DOIs
Publication statusPublished - 2017

Fingerprint

Ionic conductivity
Electrolytes
Sintering
Microstructure
Powders
Temperature
Samarium
Fluorspar
Cerium compounds
Citric acid
Barium
Electrochemical impedance spectroscopy
Citric Acid
Nitrates
Activation energy
Crystal structure
Doping (additives)
Impurities

Keywords

  • CeO
  • Doping
  • Ionic conductivity
  • Microstructure
  • Sintering

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Effect of sintering temperature on the microstructure and ionic conductivity of Ce0.8Sm0.1Ba0.1O2-δ electrolyte. / Anwar, Mustafa; Muhammed Ali, S. A.; Abdalla, Abdalla M.; Somalu, Mahendra Rao; Muchtar, Andanastuti.

In: Processing and Application of Ceramics, Vol. 11, No. 1, 2017, p. 67-74.

Research output: Contribution to journalArticle

@article{dd4ae52318374eaab3b563915595dde5,
title = "Effect of sintering temperature on the microstructure and ionic conductivity of Ce0.8Sm0.1Ba0.1O2-δ electrolyte",
abstract = "This study investigated the effects of sintering temperature on the microstructure and ionic conductivity of codoped ceria electrolyte with barium and samarium as dopants. The electrolyte (Ce0.8Sm0.1Ba0.1O2-δ) powder was synthesized using the citric acid-nitrate combustion method and calcined at 900°C for 5 h. The calcined electrolyte exhibited a cubic fluorite crystal structure with some impurity phases. The calcined powder was then pressed into cylindrical pellets using uniaxial die-pressing. The pellets were sintered at three different temperatures, i.e., 1200, 1300 and 1400°C for 5 h. Microstructural analysis of the pellets showed that the average grain size increased with the increase in sintering temperature. The sintered densities of the pellets were measured by Archimedes' method, and the relative density values were within the range of 78 {\%}TD to 87 {\%}TD as the sintering temperature increased from 1200 to 1400°C. Electrochemical impedance spectroscopy analysis showed that conductivity increased with the increase in sintering temperature, but no considerable change in conductivity was observed for the pellets sintered at 1300 and 1400°C. The results revealed that the electrolyte pellet sintered at 1300°C exhibited the ionic conductivity of 0.005 S/cm with lowest activation energy of 0.7275 eV.",
keywords = "CeO, Doping, Ionic conductivity, Microstructure, Sintering",
author = "Mustafa Anwar and {Muhammed Ali}, {S. A.} and Abdalla, {Abdalla M.} and Somalu, {Mahendra Rao} and Andanastuti Muchtar",
year = "2017",
doi = "10.2298/PAC1701067A",
language = "English",
volume = "11",
pages = "67--74",
journal = "Processing and Application of Ceramics",
issn = "1820-6131",
publisher = "University of Novi Sad",
number = "1",

}

TY - JOUR

T1 - Effect of sintering temperature on the microstructure and ionic conductivity of Ce0.8Sm0.1Ba0.1O2-δ electrolyte

AU - Anwar, Mustafa

AU - Muhammed Ali, S. A.

AU - Abdalla, Abdalla M.

AU - Somalu, Mahendra Rao

AU - Muchtar, Andanastuti

PY - 2017

Y1 - 2017

N2 - This study investigated the effects of sintering temperature on the microstructure and ionic conductivity of codoped ceria electrolyte with barium and samarium as dopants. The electrolyte (Ce0.8Sm0.1Ba0.1O2-δ) powder was synthesized using the citric acid-nitrate combustion method and calcined at 900°C for 5 h. The calcined electrolyte exhibited a cubic fluorite crystal structure with some impurity phases. The calcined powder was then pressed into cylindrical pellets using uniaxial die-pressing. The pellets were sintered at three different temperatures, i.e., 1200, 1300 and 1400°C for 5 h. Microstructural analysis of the pellets showed that the average grain size increased with the increase in sintering temperature. The sintered densities of the pellets were measured by Archimedes' method, and the relative density values were within the range of 78 %TD to 87 %TD as the sintering temperature increased from 1200 to 1400°C. Electrochemical impedance spectroscopy analysis showed that conductivity increased with the increase in sintering temperature, but no considerable change in conductivity was observed for the pellets sintered at 1300 and 1400°C. The results revealed that the electrolyte pellet sintered at 1300°C exhibited the ionic conductivity of 0.005 S/cm with lowest activation energy of 0.7275 eV.

AB - This study investigated the effects of sintering temperature on the microstructure and ionic conductivity of codoped ceria electrolyte with barium and samarium as dopants. The electrolyte (Ce0.8Sm0.1Ba0.1O2-δ) powder was synthesized using the citric acid-nitrate combustion method and calcined at 900°C for 5 h. The calcined electrolyte exhibited a cubic fluorite crystal structure with some impurity phases. The calcined powder was then pressed into cylindrical pellets using uniaxial die-pressing. The pellets were sintered at three different temperatures, i.e., 1200, 1300 and 1400°C for 5 h. Microstructural analysis of the pellets showed that the average grain size increased with the increase in sintering temperature. The sintered densities of the pellets were measured by Archimedes' method, and the relative density values were within the range of 78 %TD to 87 %TD as the sintering temperature increased from 1200 to 1400°C. Electrochemical impedance spectroscopy analysis showed that conductivity increased with the increase in sintering temperature, but no considerable change in conductivity was observed for the pellets sintered at 1300 and 1400°C. The results revealed that the electrolyte pellet sintered at 1300°C exhibited the ionic conductivity of 0.005 S/cm with lowest activation energy of 0.7275 eV.

KW - CeO

KW - Doping

KW - Ionic conductivity

KW - Microstructure

KW - Sintering

UR - http://www.scopus.com/inward/record.url?scp=85017556695&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85017556695&partnerID=8YFLogxK

U2 - 10.2298/PAC1701067A

DO - 10.2298/PAC1701067A

M3 - Article

AN - SCOPUS:85017556695

VL - 11

SP - 67

EP - 74

JO - Processing and Application of Ceramics

JF - Processing and Application of Ceramics

SN - 1820-6131

IS - 1

ER -