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Titolo:
Equilibration kinetics of (La,Sr)MnO3
Autore:
Rekas, M; Bak, T; Nowotny, J; Sorrell, CC; Zhao, Y; Foger, K; Vance, ER;
Indirizzi:
Univ New S Wales, Sch Mat Sci & Engn, Ctr Mat Res Energy Convers, Sydney, NSW 2052, Australia Univ New S Wales Sydney NSW Australia 2052 s, Sydney, NSW 2052, Australia Ceram Fuel Cells Ltd, Noble Pk, Vic 3174, Australia Ceram Fuel Cells Ltd Noble Pk Vic Australia 3174 Pk, Vic 3174, Australia Australian Nucl Sci & Technol Org, Div Mat, Lucas Hts, NSW 2234, AustraliaAustralian Nucl Sci & Technol Org Lucas Hts NSW Australia 2234 Australia
Titolo Testata:
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
fascicolo: 9, volume: 11, anno: 2000,
pagine: 697 - 702
SICI:
0957-4522(200012)11:9<697:EKO(>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
OXIDATION-REDUCTION BEHAVIOR; SR-DOPED LAMNO3; DEFECT STRUCTURE; DIFFUSION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
--discip_EC--
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Rekas, M Univ New S Wales, Sch Mat Sci & Engn, Ctr Mat Res Energy Convers,Sydney, NSW 2052, Australia Univ New S Wales Sydney NSW Australia 2052 , NSW 2052, Australia
Citazione:
M. Rekas et al., "Equilibration kinetics of (La,Sr)MnO3", J MAT S-M E, 11(9), 2000, pp. 697-702

Abstract

The present work reports isothermal changes of oxygen non-stoichiometry for the perovskite-type electrode material (La0.8Sr0.2)MnO3 in the temperature range 945-1255 K. A thermogravimetric method was used to monitor the rateof the gas/solid equilibration. For equilibration degrees larger than 0.5,the equilibration kinetic data can be described by a diffusion equation. The determined chemical diffusion coefficient depends essentially on the oxygen partial pressure. Its temperature dependence can be expressed by the following expressions at low and high p(O-2), respectively:D (chem)=(1.9 +/- 1.6)10(-3)exp-(83.4 +/- 15.8)kJmol(-1)/RT(cm(2)s(1)) (1)D (chem)=(1.6 +/- 0.6)10(-1)exp-(121.2 +/- 8.2)kJmol(-1)/RT(cm(2)s(-1)) (2)(C) 2000 Kluwer Academic Publishers.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/09/20 alle ore 12:06:31