Title

Room-temperature creep of LaCoO(3)-based perovskites: Equilibrium strain under compression

Authors

Authors

M. Lugovy; V. Slyunyayev; N. Orlovskaya; D. Verbylo;M. J. Reece

Comments

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Abbreviated Journal Title

Phys. Rev. B

Keywords

BIFUNCTIONAL OXYGEN ELECTRODES; OXIDATION; PZT; FERROELASTICITY; LA0.6CA0.4COO3; LA1-XCAXCOO3; CERAMICS; CATALYST; TITANATE; MODEL; Physics, Condensed Matter

Abstract

This study concerns an experimental investigation of room-temperature creep at different stresses in polycrystalline LaCoO(3)-based oxides under compression. A phenomenological approach for ferroelastic creep is proposed to identify the most important parameters that affect creep strain over different time periods. An analytical expression is obtained instead of the previously used power law, allowing an estimation of equilibrium strain at constant stress. An expression is also proposed to calculate the characteristic time of creep and recovery processes. The equilibrium creep diagrams for LaCoO(3) and La(0.8)Ca(0.2)CoO(3) perovskites have been determined.

Journal Title

Physical Review B

Volume

78

Issue/Number

2

Publication Date

1-1-2008

Document Type

Article

Language

English

First Page

9

WOS Identifier

WOS:000258190200034

ISSN

1098-0121

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