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Titolo:
DEFECT CHEMISTRY OF (LA,SR)MNO3
Autore:
NOWOTNY J; REKAS M;
Indirizzi:
AUSTRALIAN NUCL SCI & TECHNOL ORG,LUCAS HTS SCI & TECHNOL CTR,DIV MATMENAI NSW 2234 AUSTRALIA
Titolo Testata:
Journal of the American Ceramic Society
fascicolo: 1, volume: 81, anno: 1998,
pagine: 67 - 80
SICI:
0002-7820(1998)81:1<67:DCO(>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
OXIDATION-REDUCTION BEHAVIOR; SR-DOPED LAMNO3; HIGH-TEMPERATURE; MODEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
J. Nowotny e M. Rekas, "DEFECT CHEMISTRY OF (LA,SR)MNO3", Journal of the American Ceramic Society, 81(1), 1998, pp. 67-80

Abstract

Defect-disorder models are derived for undoped and strontium-doped LaMnO3. A random-defect model and a cluster-defect model are both considered within the regimes that correspond to oxygen deficit and oxygen excess. The models are constructed based on the experimental nonstoichiometry data that was reported by previous researchers. According to both models, the addition of strontium leads to an increase of the concentration of electron holes and oxygen nonstoichiometry. The defect clusters that are predicted by the cluster model have a marked concentration only at very low oxygen partial pressures. Both models are verified against the electrical-conductivity data. A good agreement between the random-defect model and the experimental data is shown.

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Documento generato il 24/09/20 alle ore 10:59:18