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DC Field | Value | Language |
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dc.citation.startPage | 25 | - |
dc.citation.title | SOLID STATE IONICS | - |
dc.citation.volume | 228 | - |
dc.contributor.author | Sengodan, Sivaprakash | - |
dc.contributor.author | Ahn, Sunghoo | - |
dc.contributor.author | Shin, Jeeyoung | - |
dc.contributor.author | Kim, Guntae | - |
dc.date.accessioned | 2023-12-22T04:38:18Z | - |
dc.date.available | 2023-12-22T04:38:18Z | - |
dc.date.created | 2013-06-11 | - |
dc.date.issued | 2012-11 | - |
dc.description.abstract | Oxygen non-stoichiometry ofLa(0.8)Sr(0.2)Sc(y)Mn(1-y)O(3 +/-delta) (y = 0.2, 0.3, 0.4) oxide was studied by coulometric titration as a function of oxygen partial pressure, p(O-2), and temperature in a range of 923-1023 K. Depending on the Sc doping amount, p(O-2), and temperature, oxygen non-stoichiometry varies significantly. Under a reducing condition, La0.8Sr0.2ScyMn1-yO3 +/-delta shows both oxygen excess and oxygen deficient compositions. At the higher p(O-2) region, the oxygen excess composition is due to metal ion vacancies, whereas in the lower p(O-2) region, the oxygen deficient composition is due to the formation of oxygen vacancies. The experimental data were analyzed by a random defect model. Partial molar enthalpy and partial molar entropy of oxygen vacancy formation are calculated using the Gibbs-Helmholtz equation from the non-stoichiometric data. The electrical conductivity was measured as the function of the oxygen partial pressure and temperature. In the lower p(O-2) region, electrical conductivity strongly depends on the oxygen non-stoichiometry. | - |
dc.identifier.bibliographicCitation | SOLID STATE IONICS, v.228, pp.25 | - |
dc.identifier.doi | 10.1016/j.ssi.2012.09.004 | - |
dc.identifier.issn | 0167-2738 | - |
dc.identifier.scopusid | 2-s2.0-84866784149 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/2969 | - |
dc.identifier.url | http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84866784149 | - |
dc.identifier.wosid | 000312522800005 | - |
dc.language | 영어 | - |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.title | Oxidation-reduction behavior of La0.8Sr0.2ScyMn1-yO3 +/-delta (y=0.2, 0.3, 0.4): Defect structure, thermodynamic and electrical properties | - |
dc.type | Article | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical; Physics, Condensed Matter | - |
dc.relation.journalResearchArea | Chemistry; Physics | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Perovskite (AA &apos | - |
dc.subject.keywordAuthor | BB &apos | - |
dc.subject.keywordAuthor | O-3 +/-delta) | - |
dc.subject.keywordAuthor | Intermediate temperature solid oxide fuel cell (IT-SOFC) | - |
dc.subject.keywordAuthor | Coulometric titration | - |
dc.subject.keywordAuthor | Oxygen non-stoichiometry | - |
dc.subject.keywordAuthor | Defect chemistry | - |
dc.subject.keywordAuthor | Thermodynamics | - |
dc.subject.keywordAuthor | Electrical conductivity | - |
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