Issue 19, 2013
From the journal:

Journal of Materials Chemistry A

Ca-substituted, A-site deficient perovskite La0.2Sr0.7TiO3 as a potential anode material for SOFCs

Ahmed D. Aljaberia  and  John T. S. Irvine*a  

* Corresponding authors

a School of Chemistry, University of St Andrews, St Andrews, Fife, Scotland, UK
E-mail: jtsi@st-andrews.ac.uk
Fax: +44 (0)1334 463808
Tel: +44 (0)1334 463817

Abstract

Samples from across the solid solution series La0.2Sr0.7−xCaxTiO3, were successfully synthesised by solid state reaction. Structural properties were determined at room temperature using X-ray powder diffraction and conductivity measurements were performed using the four probe DC and van der Pauw techniques at different temperatures and atmospheres. On increasing x, the perovskite phase lattice symmetry changes from cubic Pm[3 with combining macron]m to tetragonal I4/mcm at x = 0.05 and tetragonal to orthorhombic Pbnm at x = 0.425. The lattice also shrinks as x increases. Samples showed only a slight 0.3% increase in lattice volume after reduction at 900 °C in 5% H2. On increasing calcium doping, conductivity in reduced samples and equilibrated at 900 °C in 5%H2 increased markedly reaching 27.53 S cm−1 at x = 0.45, but decreased as x increased further.

Graphical abstract: Ca-substituted, A-site deficient perovskite La0.2Sr0.7TiO3 as a potential anode material for SOFCs

About
Cited by
Related
Download options Please wait...

Article information

DOI
https://doi.org/10.1039/C3TA10844A
Article type
Paper
Submitted
28 Feb 2013
Accepted
19 Mar 2013
First published
20 Mar 2013

J. Mater. Chem. A, 2013,1, 5868-5874

Permissions

Request permissions

Ca-substituted, A-site deficient perovskite La0.2Sr0.7TiO3 as a potential anode material for SOFCs

A. D. Aljaberi and J. T. S. Irvine, J. Mater. Chem. A, 2013, 1, 5868 DOI: 10.1039/C3TA10844A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements