Preparation of La1−xSrxMnO3 thin films by a pyrosol derived method

Gharbage, B.; Hénault, Marc; Pagnier, Thierry; Hammou, A.

doi:10.1016/0025-5408(91)90082-w

Cited by 27 publications

(10 citation statements)

References 10 publications

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“…Two semicircular arcs could be identified. The contribution from Journal of the Ceramic Society of Japan 123 [5] 367-373 2015 the grain, grain boundary and electrode were identified in the figure. The total impedance from zero to the end of the grain boundary semicircle is used to determine the total electrical conductivity of the Gd 2 Ti 2 O 7 .…”

Section: Resultsmentioning

confidence: 99%

Electrical properties of the (Gd2−xLix)Ti2O7−x co-existence with the LiO0.5 self-flux

Wen

Tsai

Hsu

et al. 2015

J. Ceram. Soc. Japan

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A series of (Gd 2¹x Li x )Ti 2 O 7¹x with x = 0.0500.150, abbreviated as GLT-2L were prepared by the addition of 2x mole of LiO 0.5 self-flux in the parent compound. Preparation temperatures were between 1450 and 1500°C depending on the amount of the selfflux addition. Relative densities of all GLT-2L samples were larger than 97.9(3)%. However, the parent compound, Gd 2 Ti 2 O 7 has no LiO 0.5 co-existence, it has a relative density of 92.8(4)% only, although it was prepared at a higher temperature, 1650°C. Among the GLT-2L samples, the one with x = 0.110 has the highest total electrical conductivity, 6.17(6) © 10 ¹5 S·cm ¹1 at 700°C and the lowest activation energy, 0.95(3) eV. Doping Li + ions into the Gd-site of Gd 2 Ti 2 O 7 , preparation temperature was lowered and samples become denser. Meanwhile, vacancies were created and electrical conductivity was increased. At 500°C, average ionic transference numbers (t i ) found for all samples are fully ionic. Increasing temperature, t i decreases slightly due to the increase of the fractional electronic conductivity of the (Gd 2¹x Li x )Ti 2 O 7¹x , which is a mixed conductor at high temperature. Ti atoms are in the the mixed valence states.

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Section: Resultsmentioning

confidence: 99%

Electrical properties of the (Gd2−xLix)Ti2O7−x co-existence with the LiO0.5 self-flux

Wen

Tsai

Hsu

et al. 2015

J. Ceram. Soc. Japan

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“…As Figuras 11 e 12 apresentam os difratogramas dos pós de NSM e de LSCF (LSCF1a, LSCF1b e LSCF02) respectivamente. A caracterização por DRX para os pós de NSM foi baseada no trabalho de GHARBAGE et al [22]. Para as concentrações de neodímio (Nd) e de estrôncio (Sr) utilizadas neste trabalho; é esperado obter uma estrutura ortorrômbica com parâmetros de rede de aproximadamente: a O difratograma da amostra LSCF01, apresenta a presença de duas fases, sendo uma de LSCF e outra de Sr 2 FeO 4 (LSCF01a).…”

Section: Difração De Raios Xunclassified

Síntese e caracterização dos pós de Nd1-xSrxMnO3 e La1-xSrxCo1-yFeyO3

Vargas¹,

Chiba²,

Andreoli³

et al. 2007

Matéria (Rio J.)

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Os materiais cerâmicos têm sido amplamente estudados durante várias décadas para utilização em Células a Combustível, principalmente em Células a Combustível de Óxido Sólido de Temperatura Alta. Entretanto, não tendo sido superados completamente todos os problemas decorrentes da alta temperatura de operação desses dispositivos, continuam os trabalhos de pesquisa e de desenvolvimento na busca de materiais compatíveis para operacionalizar esses dispositivos em altas temperaturas, assim como em temperaturas intermediárias. Por esses motivos, muitos esforços têm sido concentrados para minimizar os problemas que ocorrem com esses materiais e a atenção vem sendo direcionada para a seleção e obtenção de materiais cerâmicos utilizados na Célula a Combustível de Óxido Sólido de Temperatura Intermediária. Seguindo este contexto, o presente trabalho tem como objetivo apresentar as principais características dos pós de Nd1-XSrXMnO3 e La1-XSrXCo1-YFeYO3, que constituem o eletrodo catódico. Os pós foram obtidos pelo método cerâmico de mistura de pós e pela técnica dos citratos, respectivamente. Os pós desses materiais foram caracterizados e analisados por técnicas químicas, físicas e microestruturais. Como principal resultado, verificou-se que a homogeneidade das partículas destes pós é adequada para a preparação de suspensões que podem ser aplicadas no eletrólito sólido.

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“…Indeed, since a long time, oxides with structure derived from the perovskite fascinate the chemists of the solid state, because of the flexibility of this structure which allows to play on the stoichiometry of each of the undernetwork (cations and anions) and to control chemical and physical properties [6][7][8]. Sr doped LaMnO 3 +d are used in various applications [9][10][11], among which are the fabrication of cathodes for the solid oxide fuel cells (SOFCs) which are promising for the generation of electricity with little environmental pollution; the best results are obtained for the solid solution La 0.7 Sr 0.3 MnO 3+ d [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Optimization of the hydrothermal synthesis of La0.7Sr0.3MnO3+δ using an original optimal experimental design

et al. 2005

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Preparation of La1−xSrxMnO3 thin films by a pyrosol derived method

Cited by 27 publications

References 10 publications

Electrical properties of the (Gd<sub>2−</sub><i><sub>x</sub></i>Li<i><sub>x</sub></i>)Ti<sub>2</sub>O<sub>7−</sub><i><sub>x</sub></i> co-existence with the LiO<sub>0.5</sub> self-flux

Electrical properties of the (Gd<sub>2−</sub><i><sub>x</sub></i>Li<i><sub>x</sub></i>)Ti<sub>2</sub>O<sub>7−</sub><i><sub>x</sub></i> co-existence with the LiO<sub>0.5</sub> self-flux

Síntese e caracterização dos pós de Nd1-xSrxMnO3 e La1-xSrxCo1-yFeyO3

Optimization of the hydrothermal synthesis of La0.7Sr0.3MnO3+δ using an original optimal experimental design

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Preparation of La1−xSrxMnO3 thin films by a pyrosol derived method

Cited by 27 publications

References 10 publications

Electrical properties of the (Gd<sub>2&minus;</sub><i><sub>x</sub></i>Li<i><sub>x</sub></i>)Ti<sub>2</sub>O<sub>7&minus;</sub><i><sub>x</sub></i> co-existence with the LiO<sub>0.5</sub> self-flux

Electrical properties of the (Gd<sub>2&minus;</sub><i><sub>x</sub></i>Li<i><sub>x</sub></i>)Ti<sub>2</sub>O<sub>7&minus;</sub><i><sub>x</sub></i> co-existence with the LiO<sub>0.5</sub> self-flux

Síntese e caracterização dos pós de Nd1-xSrxMnO3 e La1-xSrxCo1-yFeyO3

Optimization of the hydrothermal synthesis of La0.7Sr0.3MnO3+δ using an original optimal experimental design

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Product

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Electrical properties of the (Gd<sub>2−</sub><i><sub>x</sub></i>Li<i><sub>x</sub></i>)Ti<sub>2</sub>O<sub>7−</sub><i><sub>x</sub></i> co-existence with the LiO<sub>0.5</sub> self-flux

Electrical properties of the (Gd<sub>2−</sub><i><sub>x</sub></i>Li<i><sub>x</sub></i>)Ti<sub>2</sub>O<sub>7−</sub><i><sub>x</sub></i> co-existence with the LiO<sub>0.5</sub> self-flux