P(O2)-stability of LaFe1-xNixO 3-δ solid solutions at 1100 °c / Kiselev E.A., Cherepanov V.A. // Journal of Solid State Chemistry. - 2010. - V. 183, l. 9. - P. 1992-1997.

ISSN:

00224596

Type:

Article

Abstract:

LaFe1-xNixO3-δ (x=0.1-1.0) perovskites were synthesized via citrate route. The p(O2)-stability of the perovskite phases LaFe1-xNixO3-δ has been evaluated at 1100 °C based on the results of XRD analysis of powder samples annealed at various p(O2) and quenched to room temperature. The isothermal LaFeO3-δ"LaNiO3-δ" cross-section of the phase diagram of the LaFeNiO system has been proposed in the range of oxygen partial pressure -15<log p(O2)/atm≤0.68. The unit cell parameters of orthorhombic perovskites O-LaFe1-xNi xO3-δ increase with decrease in p(O2) at fixed composition x. This behavior is explained on the basis of size factor. The decomposition temperatures of rhombohedral phases R-LaFe1-xNi xO3-δ for x=0.7, 0.8, 0.9 and 1.0 in air were determined as 1137, 1086, 1060 and 995 °C, respectively. © 2010 Elsevier Inc. All rights reserved.

Author keywords:

LaFe1-xNixO3-δ; Perovskite; Phase diagram; Thermodynamic stability

Index keywords:

Citrate route; Decomposition temperature; Orthorhombic perovskite; Oxygen partial pressure; Perovskite phasis; Powder samples; Rhombohedral phasis; Room temperature; Unit cell parameters; XRD analysis

DOI:

10.1016/j.jssc.2010.06.013

Смотреть в Scopus:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-78649737339&doi=10.1016%2fj.jssc.2010.06.013&partnerID=40&md5=a450c469b58dec8a084c31f0cab44a43

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Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-78649737339&doi=10.1016%2fj.jssc.2010.06.013&partnerID=40&md5=a450c469b58dec8a084c31f0cab44a43
Affiliations	Department of Chemistry, Ural State University, Lenin Ave. 51, 620083 Ekaterinburg, Russian Federation
Author Keywords	LaFe1-xNixO3-δ; Perovskite; Phase diagram; Thermodynamic stability
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Correspondence Address	Kiselev, E. A.; Department of Chemistry, Ural State University, Lenin Ave. 51, 620083 Ekaterinburg, Russian Federation; email: Eugene.Kiselyov@usu.ru
CODEN	JSSCB
Language of Original Document	English
Abbreviated Source Title	J. Solid State Chem.
Source	Scopus