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Output details

13 - Electrical and Electronic Engineering, Metallurgy and Materials

University of Sheffield : B - Materials Science and Engineering

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Output 22 of 128 in the submission

Article title

Comment on the origin(s) of the giant permittivity effect in CaCu3Ti4O12 single crystals and ceramics

Type

D - Journal article

DOI

10.1039/b910871h

Title of journal

Journal of Materials Chemistry

Article number

Volume number

Issue number

First page of article

5916

ISSN of journal

13645501

Year of publication

2009

URL

Number of additional authors

Additional information

There is a major drive to introduce new ceramic capacitors with higher capacitance and improved temperature stability (1 trillion produced annually). We use impedance spectroscopy to resolve an on-going controversy (>800 publications since 2000) regarding the origin of giant permittivity in calcium copper titanate (CCTO) (DOI: 10.1006/jssc.2000.8703 and 10.1126/science.1061655). We demonstrated that the origin of the permittivity is an extrinsic not an intrinsic effect but different for single crystals and ceramics. This work resolved the debate of giant permittivity in CCTO materials and has resulted in several invited talks at international conferences, e.g. European Materials Research Society (E-MRS) 2009.

Interdisciplinary

Cross-referral requested

Research group

None

Proposed double-weighted

Double-weighted statement

Reserve for a double-weighted output

Non-English

English abstract