Oxygen nonstoichiometry of LnMnO3− (Ln=La, Pr, Nd, Sm and Y)

Atsumi, Taroh; Ohgushi, Tatsuo; Namikata, Hideki; Kamegashira, Naoki

doi:10.1016/s0925-8388(96)02610-2

Cited by 24 publications

(10 citation statements)

References 17 publications

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“…h-YMnO 3 shows slight oxygen non-stoichiometry at low oxygen partial pressure. This was investigated by Kamata et al [20] and Atsumi et al [30]. Kamata et al [20] reported that at 1473 K, the oxygen deficiency, x in YMnO 3−x , is around 0.04 for P O 2 = 1.5 × 10 −2 Pa and that h-YMnO 3 decomposes at P O 2 = 1.1 × 10 −2 Pa. At high oxygen partial pressure, h-YMnO 3 exhibits little oxygen excess.…”

Section: H-ymnomentioning

confidence: 94%

Thermodynamic assessment of the Mn–Y–O system

Chen

Hallstedt

Gauckler

2005

Journal of Alloys and Compounds

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Section: H-ymnomentioning

confidence: 94%

Thermodynamic assessment of the Mn–Y–O system

Chen

Hallstedt

Gauckler

2005

Journal of Alloys and Compounds

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“…Apparently, nonstoichiometry of the phases is small and it did not affect the cell operation. Actually, Atsumi et al [12] showed that the d values of LnMnO 3Àd phases for Ln from Yb to Dy are fairly small.…”

Section: Discussionmentioning

confidence: 99%

Gibbs free energy of formation of the LnMnO3 (Ln=Yb, Ho, and Er) phases determined by the e.m.f. method

Pawlas-Foryst

Fitzner

2007

The Journal of Chemical Thermodynamics

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“…In fact, the oxygen sublattice is complete and the non-stoichiometry is realized by vacancy disordering of cationic A-and B-sublattices and from a structural point of view it is more correct to represent the formula of such manganite Ln 1-y Mn 1-y O 3 [14][15][16][17][18][19][20][21][22][23][24]. Another feature distinguishing Mn-containing systems, is an obvious area of homogeneity on the metal components Ln 1-x MnO 3 and LnMn 1-x O 3 [13,[25][26][27][28][29].…”

Section: Phase Equilibrium In Systems With T = Mnmentioning

confidence: 99%

Phase equilibria and thermodynamic properties of oxide systems on the basis of rare earth, alkaline earth and 3d-transition (Mn, Fe, Co) metals. A short overview of

et al. 2015

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Phase equilibria and thermodynamic properties of oxide systems on the basis of rare earth, alkaline earth and 3d-transition (Mn, Fe, Co) metals. A short overview of.Review is dedicated studies of phase equilibria in the systems based on rare earth elements and 3d transition metals. It's highlighted several structural families of these compounds and is shown that many were found interesting properties for practical application, such as high conductivity up to the superconducting state, magnetic properties, catalytic activity of the processes of afterburning of exhaust gases, the high mobility in the oxygen sublattice and more.Keywords: phase equilibrium; manganites; isobaric-isothermal diagrams; solid solutions © Cherepanov V. A., Gavrilova L. Ya., Volkova N. E., Urusova A. S., Aksenova T. V., Kiselev E., 2015 IntroductionThe studies of phase equilibria in the systems based on rare earth elements and 3d transition metals and thermodynamic parameters of the oxide phases formed in these systems was initiated by Vladimir Mikhailovich Zhukovsky in 1977 under the direct supervision of Alexander Nikolaevich Petrov, as the development of contractual issues, conducted with an experienced company GIREDMET. The works on the study of the system Sm-Co-O and properties of oxide phases formed in system were then extended to other rare earth elements (REE) [1][2][3][4][5][6][7][8] and 3d transition metals [9][10][11][12][13]. A characteristic feature of these systems is the formation of oxide phases with perovskite structure AVO 3 and related. The partial substitution of rare earth elements in alkaline earth metals (AEM) leads to significant change of properties and they found a wide range of interesting for practical applications of the properties such as high conductivity up to the superconducting state, magnetic properties, catalytic activity of the processes of afterburning of exhaust gases and a variety of redox reactions, high mobility in the oxygen sublattice and more. In addition, partial substitution in the A-sublattice under constant 3d-cation in the systems Ln-T-O allows to stabilize the structure, which Cherepanov V. A., Gavrilova L. Ya., Volkova N. E., Urusova A. S., Aksenova T. V., Kiselev E. in the given conditions (temperature and oxygen pressure) are thermodynamically unstable. Therefore, further development of investigations of phase equilibria and thermodynamic stability of complex oxides were targeting the systems Ln-M-T-O (where Ln = REE, M = Ca, Sr, Ba; T = Mn, Fe, Co, Ni, Cu). When a certain percentage of similarity (in all possible formation of a phase with perovskite structure LnTO 3±d ) these systems still have a noticeable and distinctive features depending on the nature of the components. Phase equilibrium in systems with T = MnThe significant difference of perovskite phases in the manganese-containing systems Ln-Mn-O is that the oxygen content in them exceeds the stoichiometric air LnMnO 3+d . In fact, the oxygen sublattice is complete and the non-stoichiometry is realized by vacancy disordering ...

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Oxygen nonstoichiometry of LnMnO3− (Ln=La, Pr, Nd, Sm and Y)

Cited by 24 publications

References 17 publications

Thermodynamic assessment of the Mn–Y–O system

Thermodynamic assessment of the Mn–Y–O system

Gibbs free energy of formation of the LnMnO3 (Ln=Yb, Ho, and Er) phases determined by the e.m.f. method

Phase equilibria and thermodynamic properties of oxide systems on the basis of rare earth, alkaline earth and 3d-transition (Mn, Fe, Co) metals. A short overview of

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