Structural and morphology comparison between m-LaVO4 and LaVO3 compounds prepared by sol-gel acrylamide polymerization and solid state reaction

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Título :	Structural and morphology comparison between m-LaVO4 and LaVO3 compounds prepared by sol-gel acrylamide polymerization and solid state reaction
Palabras clave :	Ceramics Sol–gel processes
Fecha de publicación :	16-ene-2013
Editorial :	elservier
Descripción :	We contrast the production of LaVO3 polycrystalline samples obtained by reduction of m-LaVO4 prepared by sol–gel acrylamide polymerization (SGAP) and solid state reaction (SSR). For SGAP the formation of m- LaVO4 occurs at 400 ◦C, for SSR at 1400 ◦C. For m-LaVO4-SGAP we observe a homogeneous morphology with needle-shaped grains of 50nm average size. The SSR presents a broader size distribution in the micrometer range. Both m-LaVO4 samples were reduced into LaVO3 using a Zr rod at 850 ◦C in vacuum. LaVO3-SGAP presents a homogeneous grain distribution with an average size of 745 nm. LaVO3-SSR has an average size of 3.45 m. The stoichiometry of all compoundswas confirmed by energy dispersive X-ray spectroscopy. X-ray powder diffraction and transmission electron microscopy give crystal structures in agreement with those reported in the literature.
URI :	http://www.repositoriodigital.ipn.mx/handle/123456789/11459
Otros identificadores :	http://hdl.handle.net/123456789/979
Aparece en las colecciones:	Doctorado

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RESUMEN LaVO3.docx		13.05 kB	Microsoft Word XML	Visualizar/Abrir

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