Synthesis, oxygen nonstoichiometry and total conductivity of (La,Sr)(2)(Mn,Ni)O-4 +/-delta / Gilev A. R.,Kiselev E. A.,Cherepanov V. A. // SOLID STATE IONICS. - 2015. - V. 279, l. . - P. 53-59.

ISSN/EISSN:

0167-2738 / 1872-7689

Type:

Article

Abstract:

The series of complex oxides, La2-xSrxNi1-yMnyO4-delta (x = 0.7-1, y = 0.1, 0.2, 0.3, 0.5, 0.7), were synthesized via glycine-nitrate and citrate-nitrate combustion techniques followed by sintering at 1350-1400 degrees C in air. All single-phase compounds have the K2NiF4-type structure (sp.gr.I4/mmm). The unit cell volume increases with y and decreases with x in La2-xSrxNi1-yMnyO4 +/-delta. At room temperature, the solid solutions LaSrNi1-yMnyO4 +/-delta (y = 0.1, 03, 0.5, and 0.7) show a small excess of oxygen (delta > 0) which increases with the manganese doping level y. Total conductivity and Seebeck coefficient were determined in air from room temperature to 1100 degrees C, with the maximum value similar to 100 S/cm for La1.2Sr0.8Ni0.9Mn0.1O4 +/-delta and La1.3Sr0.7Ni0.9Mn0.1O4 +/-delta. The conduction is temperature activated for all phases under study. Seebeck coefficient has tendency to decrease from low temperature to high temperature and predominantly adopts slightly negative values varying from -15 to -5 mu V/K. (C) 2015 Elsevier B.V. All rights reserved.

Author keywords:

K2NiF4-type structure; Oxygen nonstoichiometry; Mixed conductors; Manganites-nickelates; p-type conductivity; Seebeck coefficient NEUTRON POWDER DIFFRACTION; TRANSPORT-PROPERTIES; METHANE OXIDATION; DEFECT STRUCTURE; LA2NIO4+DELTA; OXIDES; LA1.2SR0.8MNO4+DELTA; LA2-XSRXNIO4+DELTA; STABILITY; NICKELATE

DOI:

10.1016/j.ssi.2015.07.017

Web of Science ID:

ISI:000378101000009

Соавторы в МНС:

Другие поля

Поле	Значение
Month	OCT 15
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
EISSN	1872-7689
Keywords-Plus	NEUTRON POWDER DIFFRACTION; TRANSPORT-PROPERTIES; METHANE OXIDATION; DEFECT STRUCTURE; LA2NIO4+DELTA; OXIDES; LA1.2SR0.8MNO4+DELTA; LA2-XSRXNIO4+DELTA; STABILITY; NICKELATE
Research-Areas	Chemistry; Physics
Web-of-Science-Categories	Chemistry, Physical; Physics, Condensed Matter
Author-Email	eugene.kiselyov@urfu.ru
ResearcherID-Numbers	Cherepanov, Vladimir/E-6451-2014
ORCID-Numbers	Cherepanov, Vladimir/0000-0003-3653-6459
Funding-Acknowledgement	Ministry of Education and Science of the Russian Federation {[}N 4.1039.2014/K]
Funding-Text	The work was financially supported by the Ministry of Education and Science of the Russian Federation (project N 4.1039.2014/K).
Number-of-Cited-References	43
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	8
Journal-ISO	Solid State Ion.
Doc-Delivery-Number	DO9IX