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Influence of synthesis route on morphology and conduction behavior of BaCe 0.8 Y 0.2 O 3−δ

Influence of synthesis route on morphology and conduction behavior of BaCe 0.8 Y 0.2 O 3−δ In this article, the role of the preparation route and calcinations temperature on the thermal expansion and conductivity of BaCe 0.8 Y 0.2 O 3−δ (BCY) has been studied. In particular, the samples were synthesized by means of the solid-state reaction and by a sol–gel route. BCY has been suggested as proton conducting electrolyte for intermediate-temperature solid oxide fuel cells (IT-SOFCs). Proton conductivity strongly depends on the densification of the material as well as the crystal structure, which is generally influenced by the preparation procedure. It was found that a single phase material could be achieved at 1000 °C for the samples prepared through the sol–gel route with ~96% packing density. In case of ceramic route, single phase could be obtained at higher temperatures (1200 °C) and does not lead to good density values. The ceramic synthesis produces BCY material in cubic symmetry where as the gel–citrate complexation route leads to homogenous orthorhombic BCY. The conductivity measurements of sample synthesized by two different routes were investigated by means of impedance spectroscopy and electron microscopy. A comparative study of thermal expansion behavior of BCY synthesized by different route was carried out. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Thermal Analysis and Calorimetry Springer Journals

Influence of synthesis route on morphology and conduction behavior of BaCe 0.8 Y 0.2 O 3−δ

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References (29)

Publisher
Springer Journals
Copyright
Copyright © 2012 by Akadémiai Kiadó, Budapest, Hungary
Subject
Chemistry; Physical Chemistry; Polymer Sciences; Measurement Science and Instrumentation; Inorganic Chemistry; Analytical Chemistry
ISSN
1388-6150
eISSN
1572-8943
DOI
10.1007/s10973-011-1658-7
Publisher site
See Article on Publisher Site

Abstract

In this article, the role of the preparation route and calcinations temperature on the thermal expansion and conductivity of BaCe 0.8 Y 0.2 O 3−δ (BCY) has been studied. In particular, the samples were synthesized by means of the solid-state reaction and by a sol–gel route. BCY has been suggested as proton conducting electrolyte for intermediate-temperature solid oxide fuel cells (IT-SOFCs). Proton conductivity strongly depends on the densification of the material as well as the crystal structure, which is generally influenced by the preparation procedure. It was found that a single phase material could be achieved at 1000 °C for the samples prepared through the sol–gel route with ~96% packing density. In case of ceramic route, single phase could be obtained at higher temperatures (1200 °C) and does not lead to good density values. The ceramic synthesis produces BCY material in cubic symmetry where as the gel–citrate complexation route leads to homogenous orthorhombic BCY. The conductivity measurements of sample synthesized by two different routes were investigated by means of impedance spectroscopy and electron microscopy. A comparative study of thermal expansion behavior of BCY synthesized by different route was carried out.

Journal

Journal of Thermal Analysis and Calorimetry – Springer Journals

Published: Jan 1, 2012

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