Structural Features of the Formation of La1-xCaxFeO3-δ (0 ≤x ≤ 0.7) Heterovalent Solid Solutions Full article
Journal |
Journal of Structural Chemistry
ISSN: 0022-4766 , E-ISSN: 1573-8779 |
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Output data | Year: 2010, Volume: 51, Number: 5, Pages: 891-897 Pages count : 7 DOI: 10.1007/s10947-010-0135-7 | ||||
Tags | mobile oxygen form, morphotropic phase transition, nanostructured state, perovskite | ||||
Authors |
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Affiliations |
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Funding (1)
1 | The Ministry of Education and Science of the Russian Federation | 2.1.1/729 |
Abstract:
A synthesis method with the use of polymer-salt compositions (calcination temperature 800°C) provides the preparation of various solid solutions of a La1−x Ca x FeO3−δ series in the 0≤ x≤ 0.7 range, which belong to the perovskite structure type. A morphotropic phase transition occurs from the orthorhombic perovskite modification
(0≤ x ≤ 0.4) to the cubic one (0.5 ≤ x≤ 0.7). A growing number of microdistortions in the perovskite structure and the formation of a microblock structure in the morphotropic phase transition region are observed with increasing degree of calcium substitution for lanthanum. Calcination of solid solutions with x = 0.6 and 0.7 at temperatures above 1000°C in the air or under conditions of reduced oxygen partial pressure (laboratory vacuum of 10−3 Torr) results in the formation of a nanostructured state with coherently grown blocks of perovskite and Grenier phase, which is due to irreversible oxygen loss.
Cite:
Nadeev A.N.
, Tsybulya S.V.
, Gerasimov E.Y.
, Kulikovskaya N.A.
, Isupova L.A.
Structural Features of the Formation of La1-xCaxFeO3-δ (0 ≤x ≤ 0.7) Heterovalent Solid Solutions
Journal of Structural Chemistry. 2010. V.51. N5. P.891-897. DOI: 10.1007/s10947-010-0135-7 WOS Scopus РИНЦ
Structural Features of the Formation of La1-xCaxFeO3-δ (0 ≤x ≤ 0.7) Heterovalent Solid Solutions
Journal of Structural Chemistry. 2010. V.51. N5. P.891-897. DOI: 10.1007/s10947-010-0135-7 WOS Scopus РИНЦ
Original:
Надеев А.Н.
, Цыбуля С.В.
, Герасимов Е.Ю.
, Куликовская Н.А.
, Исупова Л.А.
Структурные особенности формирования гетеровалентных твердых растворов La1-xCaxFeO3-δ (0 ≤x ≤ 0.7)
Журнал структурной химии. 2010. Т.51. №5. С.927-923. RSCI РИНЦ
Структурные особенности формирования гетеровалентных твердых растворов La1-xCaxFeO3-δ (0 ≤x ≤ 0.7)
Журнал структурной химии. 2010. Т.51. №5. С.927-923. RSCI РИНЦ
Dates:
Submitted: | Aug 4, 2009 |
Published print: | Oct 1, 2010 |
Published online: | Nov 19, 2010 |
Identifiers:
Web of science | WOS:000284428100012 |
Scopus | 2-s2.0-78649463824 |
Elibrary | 16693617 |
Chemical Abstracts | 2010:1445513 |
Chemical Abstracts (print) | 154:441885 |
OpenAlex | W1989433303 |