A study on the polymer precursor formation and microstructure evolution of square-shaped (La0.5Ba0.5)(Mn0.5Fe0.5)O3 ceramic nanoparticles

Dublin Core

Título

A study on the polymer precursor formation and microstructure evolution of square-shaped (La0.5Ba0.5)(Mn0.5Fe0.5)O3 ceramic nanoparticles

Tema

NANOTECNOLOGIA
PEROVSKITAS
BIBLIOGRAFIA NACIONAL QUIMICA
2015

Abstract

The polymer precursor formation and the growth mechanism of (La0.5Ba0.5)(Mn0.5Fe0.5)O3 ceramic nanoparticles have been studied. First, we focused on the influence of isolated metals (La, Ba, Mn, Fe) on the polymer precursor formation by means of Raman, FT-IR, scanning electron microscopy and differential scanning calorimetry, showing that the presence of metal ions, especially iron, increases the oxidation rate of the polymer precursor, while the presence of barium leads to a higher degree of polymerization, preventing partial oxidation of the polymer at low temperatures and allowing the presence of nitrates at the combustion stage. Nevertheless, when all metals are present, the polymer precursor showed a largely homogeneous microstructure with a global average influence from all cations. Finally,we studied the microstructure evolution of nanoparticles obtained after calcination above 700 °C. SAXS and TEM analysis suggests that the formation of square-shaped nanoparticles below 900 °C and coalescence leads to the formation of larger-sized and round-shaped nanoparticles at 900 °C.

Autor

Pardo, Helena
Vázquez, Santiago
Laborda, I.
Fernández Werner, Luciana

Fuente

Journal of Ceramic Science and Technology 2015; 6(3):6-221.

Editor

Scimago Lab

Fecha

2015

Formato

PDF

Idioma

Inglés

Tipo

Artículo

Identificador

DOI: 10.4416/JCST2015-00005
Fecha de agregación
March 31, 2016
Colección
Bibliografía Nacional Química
Tipo de Elemento
Document
Etiquetas
,
Citación
Romero, Mariano, “A study on the polymer precursor formation and microstructure evolution of square-shaped (La0.5Ba0.5)(Mn0.5Fe0.5)O3 ceramic nanoparticles,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed July 14, 2024, https://riquim.fq.edu.uy/items/show/3807.
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