Effect of minor additions of CeO2 on conductivity of perovskites with mixed ionic-electronic conductivity

E. Konysheva; J. T S Irvine

doi:10.1149/1.3050383

Effect of minor additions of CeO2 on conductivity of perovskites with mixed ionic-electronic conductivity

E. Konysheva^*, J. T S Irvine

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

6 Citations (Scopus)

Abstract

Conductivity, structure and thermochemical stability of compositions in the following series (100-x) La_0.6Sr_0.4CoO _3±δxCeO₂ (LSCC), (100-x) La _0.8Sr_0.2MnO_3±δxCeO₂ (LSMC) and (100-x) La_0.95Ni_0.6Fe_0.4O _3-δxCeO₂ (LNFC), where x=0, 2 and 10 mol%, were studied. CeO₂ has slightly higher solubility limit in La _0.6Sr_0.4CoO_3±δ and La _0.8Sr_0.2MnO_3±δ compared to La _0.95Ni_0.6Fe_0.4O_3-δ, forming LSCC2 and LSMC2 single phase solid solutions. All compositions containing more than 2 mol% ceria were two phase and consisted of a perovskite constituent with rhombohedral structure and ceria with cubic structure. Small additions of CeO₂ influence the conductivity of the modified perovskites in a different way. Conductivity in the LSCC series dramatically decreased. Adding up to 10 mol % CeO₂ slightly changed the total conductivity in the LSMC series in spite of the presence of the secondary phase. The conductivity of the perovskites as a function of oxygen partial pressure (0.21-10^-4 atm) is discussed.

Original language	English
Title of host publication	ECS Transactions - Ionic and Mixed Conducting Ceramics 6 - 213th ECS Meeting
Pages	115-122
Number of pages	8
Volume	13
Edition	26
DOIs	https://doi.org/10.1149/1.3050383
Publication status	Published - 1 Dec 2008
Event	Ionic and Mixed Conducting Ceramics 6 - 213th ECS Meeting - Phoenix, AZ, United States Duration: 18 May 2008 → 23 May 2008

Conference

Conference	Ionic and Mixed Conducting Ceramics 6 - 213th ECS Meeting
Country/Territory	United States
City	Phoenix, AZ
Period	18/05/08 → 23/05/08

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title = "Effect of minor additions of CeO2 on conductivity of perovskites with mixed ionic-electronic conductivity",

abstract = "Conductivity, structure and thermochemical stability of compositions in the following series (100-x) La0.6Sr0.4CoO 3±δxCeO2 (LSCC), (100-x) La 0.8Sr0.2MnO3±δxCeO2 (LSMC) and (100-x) La0.95Ni0.6Fe0.4O 3-δxCeO2 (LNFC), where x=0, 2 and 10 mol%, were studied. CeO2 has slightly higher solubility limit in La 0.6Sr0.4CoO3±δ and La 0.8Sr0.2MnO3±δ compared to La 0.95Ni0.6Fe0.4O3-δ, forming LSCC2 and LSMC2 single phase solid solutions. All compositions containing more than 2 mol% ceria were two phase and consisted of a perovskite constituent with rhombohedral structure and ceria with cubic structure. Small additions of CeO2 influence the conductivity of the modified perovskites in a different way. Conductivity in the LSCC series dramatically decreased. Adding up to 10 mol % CeO2 slightly changed the total conductivity in the LSMC series in spite of the presence of the secondary phase. The conductivity of the perovskites as a function of oxygen partial pressure (0.21-10-4 atm) is discussed.",

author = "E. Konysheva and Irvine, {J. T S}",

year = "2008",

month = dec,

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doi = "10.1149/1.3050383",

language = "English",

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volume = "13",

pages = "115--122",

booktitle = "ECS Transactions - Ionic and Mixed Conducting Ceramics 6 - 213th ECS Meeting",

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Konysheva, E & Irvine, JTS 2008, Effect of minor additions of CeO2 on conductivity of perovskites with mixed ionic-electronic conductivity. in ECS Transactions - Ionic and Mixed Conducting Ceramics 6 - 213th ECS Meeting. 26 edn, vol. 13, pp. 115-122, Ionic and Mixed Conducting Ceramics 6 - 213th ECS Meeting, Phoenix, AZ, United States, 18/05/08. https://doi.org/10.1149/1.3050383

TY - GEN

T1 - Effect of minor additions of CeO2 on conductivity of perovskites with mixed ionic-electronic conductivity

AU - Konysheva, E.

AU - Irvine, J. T S

PY - 2008/12/1

Y1 - 2008/12/1

N2 - Conductivity, structure and thermochemical stability of compositions in the following series (100-x) La0.6Sr0.4CoO 3±δxCeO2 (LSCC), (100-x) La 0.8Sr0.2MnO3±δxCeO2 (LSMC) and (100-x) La0.95Ni0.6Fe0.4O 3-δxCeO2 (LNFC), where x=0, 2 and 10 mol%, were studied. CeO2 has slightly higher solubility limit in La 0.6Sr0.4CoO3±δ and La 0.8Sr0.2MnO3±δ compared to La 0.95Ni0.6Fe0.4O3-δ, forming LSCC2 and LSMC2 single phase solid solutions. All compositions containing more than 2 mol% ceria were two phase and consisted of a perovskite constituent with rhombohedral structure and ceria with cubic structure. Small additions of CeO2 influence the conductivity of the modified perovskites in a different way. Conductivity in the LSCC series dramatically decreased. Adding up to 10 mol % CeO2 slightly changed the total conductivity in the LSMC series in spite of the presence of the secondary phase. The conductivity of the perovskites as a function of oxygen partial pressure (0.21-10-4 atm) is discussed.

AB - Conductivity, structure and thermochemical stability of compositions in the following series (100-x) La0.6Sr0.4CoO 3±δxCeO2 (LSCC), (100-x) La 0.8Sr0.2MnO3±δxCeO2 (LSMC) and (100-x) La0.95Ni0.6Fe0.4O 3-δxCeO2 (LNFC), where x=0, 2 and 10 mol%, were studied. CeO2 has slightly higher solubility limit in La 0.6Sr0.4CoO3±δ and La 0.8Sr0.2MnO3±δ compared to La 0.95Ni0.6Fe0.4O3-δ, forming LSCC2 and LSMC2 single phase solid solutions. All compositions containing more than 2 mol% ceria were two phase and consisted of a perovskite constituent with rhombohedral structure and ceria with cubic structure. Small additions of CeO2 influence the conductivity of the modified perovskites in a different way. Conductivity in the LSCC series dramatically decreased. Adding up to 10 mol % CeO2 slightly changed the total conductivity in the LSMC series in spite of the presence of the secondary phase. The conductivity of the perovskites as a function of oxygen partial pressure (0.21-10-4 atm) is discussed.

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U2 - 10.1149/1.3050383

DO - 10.1149/1.3050383

M3 - Conference contribution

AN - SCOPUS:66149142081

SN - 9781615672851

VL - 13

SP - 115

EP - 122

BT - ECS Transactions - Ionic and Mixed Conducting Ceramics 6 - 213th ECS Meeting

T2 - Ionic and Mixed Conducting Ceramics 6 - 213th ECS Meeting

Y2 - 18 May 2008 through 23 May 2008

ER -

Effect of minor additions of CeO2 on conductivity of perovskites with mixed ionic-electronic conductivity

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