Crystal structure and physicochemical properties of doped lanthanum manganites / Aksenova T. V.,Gavrilova L. Ya.,Cherepanov V. A. // RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A. - 2012. - V. 86, l. 12. - P. 1862-1868.

ISSN/EISSN:

0036-0244 / 1531-863X

Type:

Article

Abstract:

Substituted lanthanum-strontium manganites La0.7Sr0.3Mn0.9Me0.1O3 +/- delta (Me = Ti, Cr, Fe, and Cu) are obtained by standard ceramic and glycerin-nitrate techniques. High-temperature powder X-ray diffraction is employed to study the crystal structure of La0.7Sr0.3Mn0.9Me0.1O3 +/- delta oxides. It is shown that in the range 298-1023 K in air, La0.7Sr0.3Mn0.9Me0.103 +/- delta manganites crystallized in an orthorhombic cell (space group R-3c). The isobaric temperature dependences of unit cell parameters are determined. Thermal expansion coefficients are calculated for La(0.7)Sr(0.3)Mn(0.9)Me(0.1)0(3 +/- delta) oxides. The conductivity of La(0.7)Sr(0.3)Mn(0.9)Me(0.1)0(3 +/- delta) is studied as a function of temperature in the range 500 K a parts per thousand currency sign T a parts per thousand currency sign 1200 K in air. It is shown that substituting 3d metal for manganese considerably lowers the conductivity of basic La0.7Sr0.3Mn0.9O3 +/- delta. The chemical stability of iron-substituted manganite La0.7Sr0.3Mn0.9Fe0.1O3 +/- delta is studied with respect to the electrolyte material.

Author keywords:

lanthanum-strontium manganites; crystal structure; high-temperature X-ray diffraction PEROVSKITE-TYPE OXIDES; PHASE-EQUILIBRIA

DOI:

10.1134/S0036024412120023

Web of Science ID:

ISI:000310345600016

Соавторы в МНС:

Другие поля

Поле	Значение
Month	DEC
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1531-863X
Keywords-Plus	PEROVSKITE-TYPE OXIDES; PHASE-EQUILIBRIA
Research-Areas	Chemistry
Web-of-Science-Categories	Chemistry, Physical
ResearcherID-Numbers	Cherepanov, Vladimir/E-6451-2014
ORCID-Numbers	Cherepanov, Vladimir/0000-0003-3653-6459
Funding-Acknowledgement	RF Ministry of Education and Science under the federal target program Research and Development in Priority Aspects of Russia's Scientific and Technological Complex {[}16.552.11.7020]
Funding-Text	The work was supported by the RF Ministry of Education and Science under the federal target program Research and Development in Priority Aspects of Russia's Scientific and Technological Complex, 2007-2013 (contract no. 16.552.11.7020).
Number-of-Cited-References	19
Usage-Count-Since-2013	14
Journal-ISO	Russ. J. Phys. Chem. A
Doc-Delivery-Number	027IL