| EPSRC Reference: |
GR/S18168/01 |
| Title: |
Grain Boundary Structure and Stoichiometry of Calcium Copper Titanite Barrier Layer Capacitors |
| Principal Investigator: |
West, Professor AR |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Materials Science and Engineering |
| Organisation: |
University of Sheffield |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 April 2003 |
Ends: |
31 March 2004 |
Value (£): |
58,597
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
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Summary on Grant Application Form |
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There is much current interest, world-wide, in the dielectric properties of CaCu3Ti4O12. In many publications it has been described as exhibiting a giant dielectric phenomenon. In our preliminary results, we have shown that the phenomenon is not a bulk response but is due to a grain boundary effect and that the material effectively behaves as a barrier layer capacitor, BLC. Effective permittivities as high as 250,000 have been obtained by attention to processing conditions. Although this material has potential interest as a novel barrier layer capacitor, at this stage the prime interest is to understand the origin of BLC effect and in particular to establish the detailed structure and composition of the grain boundaries which are clearly different in some way from those of the grain interiors. This proposal represents a focused study by high resolution electron microscopy and electron energy loss spectroscopy to resolve these structural questions.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.shef.ac.uk |