Synthesis, oxygen nonstoichiometry and total conductivity of (La,Sr)2(Mn,Ni)O4± δ / Gilev A.R., Kiselev E.A., Cherepanov V.A. // Solid State Ionics. - 2015. - V. 279, l. . - P. 53-59.

ISSN:

01672738

Type:

Article

Abstract:

The series of complex oxides, La2-xSrxNi1-yMnyO4-δ (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°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± δ. At room temperature, the solid solutions LaSrNi1-yMnyO4± δ (y = 0.1, 0.3, 0.5, and 0.7) show a small excess of oxygen (δ > 0) which increases with the manganese doping level y. Total conductivity and Seebeck coefficient were determined in air from room temperature to 1100°C, with the maximum value ∼ 100 S/cm for La1.2Sr0.8Ni0.9Mn0.1O4± δ and La1.3Sr0.7Ni0.9Mn0.1O4± δ. 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 μV/K. © 2015 Elsevier B.V. All rights reserved.

Author keywords:

K2NiF4-type structure; Manganites-nickelates; Mixed conductors; Oxygen nonstoichiometry; p-type conductivity; Seebeck coefficient

Index keywords:

Amino acids; Manganites; Nickel; Nitrates; Oxygen; Seebeck coefficient; Semiconducting films; Sintering; Temperature; Mixed conductors; Nickelates; Oxygen non-stoichiometry; P type conductivity; Type

DOI:

10.1016/j.ssi.2015.07.017

Смотреть в Scopus:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938907276&doi=10.1016%2fj.ssi.2015.07.017&partnerID=40&md5=eaafa4e54d9706ddf99f154d6286983b

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Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938907276&doi=10.1016%2fj.ssi.2015.07.017&partnerID=40&md5=eaafa4e54d9706ddf99f154d6286983b
Affiliations	Department of Chemistry, Institute of Natural Sciences, Ural Federal University, Lenin Av. 51, Ekaterinburg, Russian Federation
Author Keywords	K2NiF4-type structure; Manganites-nickelates; Mixed conductors; Oxygen nonstoichiometry; p-type conductivity; Seebeck coefficient
Funding Details	Ministry of Education and Science of the Russian Federation
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Correspondence Address	Kiselev, E.A.; Department of Chemistry, Institute of Natural Sciences, Ural Federal University, Lenin Av. 51, Russian Federation
Publisher	Elsevier
CODEN	SSIOD
Language of Original Document	English
Abbreviated Source Title	Solid State Ionics
Source	Scopus