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13 - Electrical and Electronic Engineering, Metallurgy and Materials

Imperial College London : B - Metallurgy and Materials

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Article title

A family of oxide ion conductors based on the ferroelectric perovskite Na0.5Bi0.5TiO3.

Type

D - Journal article

DOI

10.1038/nmat3782

Title of journal

Nature Materials

Article number

Volume number

n/a

Issue number

First page of article

n/a

ISSN of journal

1476-1122

Year of publication

2013

URL

Number of additional authors

Additional information

New oxygen ion conductor, observations at Sheffield of high leakage current in this dielectric/ferroelectric. Material is closely related to excellent Li conductor La2/3-xLixTiO3, Na mobility was suspected. Collaboration of three laboratories used techniques developed at Imperial to prove unambiguously material is an oxygen ion conductor. Discovery is significant for two reasons, for dielectric and ferroelectric applications shown how to minimise leakage current, by control of A-site stoichiometry. For SOFC/SOEC applications opens up new class of perovskite ion/mixed conductors. Conductivity at low temperatures equivalent to some of best known materials for as yet un-optimised composition. Composition is free of rare earths.

Interdisciplinary

Cross-referral requested

Research group

None

Proposed double-weighted

Double-weighted statement

Reserve for a double-weighted output

Non-English

English abstract