La0.7Sr0.3MnO3 nanopowders: Synthesis of different powders structures and real magnetic properties of nanomanganites

Даниленко, И. А.; Konstantinova, Tetyana; Волкова, Г. К.; Glazunova, V. A.

doi:10.1016/j.matchar.2013.05.012

Cited by 12 publications

(2 citation statements)

References 21 publications

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“…El conteo estadístico aleatorio realizado sobre una población de 300 partículas derivadas del análisis por microscopía TEM confirma la obtención de cristalitos nanométricos de morfología regular, como se indica en la figura 5, los cuales tienen un tamaño promedio de 43 nm, áreas externas de cristalito de 5600 nm 2 , anchos de límite de cristal de 0,8 nm, y distancias interplanares de 0,25 nm para el principal plano de difracción (1 1 2), medidos con el programa ELMIX [13][14].…”

Section: Microscopía Electrónica De Transmisión (Met)unclassified

Síntesis y caracterización del sistema La0,8Sr0,2MnO3

Cruz-Pacheco

Cuaspud

2015

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ResumenEste trabajo reporta la síntesis y la caracterización de un óxido tipo La 0,8 Sr 0,2 MnO 3 , usando una ruta de síntesis de química húmeda, con la cual fue obtenido un material cerámico con propiedades fisicoquímicas y características estructurales de gran importancia para aplicación como componente electródico para uso en pilas de combustible de óxido sólido (SOFC). El material sintetizado se caracterizó por difracción de rayos X (XRD), obteniéndose un material con estructura tipo perovskita. Los resultados derivados de microscopia electrónica de transmisión de alta resolución (HRTEM) confirmaron la obtención de sólidos de morfología regular orientados de forma preferente en el plano (1 1 2), con distancias interplanares d calculadas de 0,25 nm con base en los resultados de HRTEM y XRD. La composición del material La 0,8 Sr 0,2 MnO 3 fue determinada mediante microanálisis de rayos X por energía dispersiva (EDX), indicando una buena concordancia entre la composición propuesta y obtenida. Los valores de área superficial y volumen de poro medidos por el método BET permiten indicar que el material preserva sus características superficiales y texturales en función del método de síntesis utilizado.Palabras clave: Manganita, Perovskitas, SOFC. AbstractThis paper reports the synthesis and characterization of an oxide type La 0.8 Sr 0.2 MnO 3 , using a wet chemistry route, which allows to obtain a ceramic material with physicochemical properties and structural characteristics of relevant importance for application as an electrode component for use in solid oxide fuel cells devices (SOFC). The synthesized material was characterized by X-ray diffraction (XRD), obtaining a material with perovskite structure. Results from High-resolution transmission electron microscopy (HRTEM), confirm the synthesis of a solid with regular morphology preferentially oriented in the (1 1 2) plane, with d spacing calculated of about 0.25 nm based on the results of HRTEM and XRD. The La 0.8 Sr 0.2 MnO 3 composition was determined by X-ray microanalysis by energy dispersive (EDX), indicating a good agreement between the proposed and obtained composition. Surface area and pore volume measured by BET method would suggest that the material maintain their textural and surface characteristics depending on the synthesis method used.

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Section: Microscopía Electrónica De Transmisión (Met)unclassified

Síntesis y caracterización del sistema La0,8Sr0,2MnO3

Cruz-Pacheco

Cuaspud

2015

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“…Therefore, it becomes necessary to explore other synthesis routes that allow greater control of the material's microstructure and morphology. For hausmannite, for example, several methods can be used to control the morphology of the final product, such as chemical reduction, co-precipitation, auto-combustion, sol-gel, solid state reaction, carburization or through the conventional hydrothermal method [22][23][24][25][26][27]. Additionally, the Microwave-Assisted Hydrothermal (MAH) method is an alternative way to synthesize manganese oxides, making it possible to obtain a final material with high crystallinity, reasonable control of particle size and morphology, in addition to be environmentally friendly (the synthesis medium is not organic) and energetically viable (short synthesis times at low temperatures) [28].…”

Section: Introductionmentioning

confidence: 99%

Manganese oxides synthesized via microwave-assisted hydrothermal method: phase evolution and structure refinement

et al. 2022

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Manganese oxides were synthesized during 40 min at 140 ºC via Microwave-Assisted Hydrothermal (MAH) method and treated at different temperatures in order to evaluate the phase evolution using structure refinement (Rietveld method). The samples obtained were heat treated at temperatures defined by means of thermal analysis (160 ºC, 480 ºC, 715 ºC, 870 ºC, 920 ºC and 1150 ºC) and analyzed by X-Ray Diffractometry (XRD), X-Ray Fluorescence (XRF), Fourier Transform Infrared (FTIR) spectroscopy, Raman scattering, UV-Vis absorption and Scanning Electron Microscopy (SEM). Structural characterizations allowed to identify five distinct phases:

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Tunable investigation optical, electrical and magnetic behaviors of Gd3+ substituted lanthanum strontium manganite La0.5-x Sr0.5GdxMnO3 nanopowders facilely synthesized through citrate precursor technique

Turky

Rashad

Hassan

et al. 2018

Journal of Alloys and Compounds

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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La0.7Sr0.3MnO3 nanopowders: Synthesis of different powders structures and real magnetic properties of nanomanganites

Cited by 12 publications

References 21 publications

Síntesis y caracterización del sistema La0,8Sr0,2MnO3

Síntesis y caracterización del sistema La0,8Sr0,2MnO3

Manganese oxides synthesized via microwave-assisted hydrothermal method: phase evolution and structure refinement

Tunable investigation optical, electrical and magnetic behaviors of Gd3+ substituted lanthanum strontium manganite La0.5-x Sr0.5GdxMnO3 nanopowders facilely synthesized through citrate precursor technique

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