Metallic electrolyte composites in the framework of the brick-layer model
- It is well known that the already large dielectric constants of some electrolytes like BaTiO₃ can be enhanced further by adding metallic (e.g. Ni, Cu or Ag) nanoparticles. The enhancement can be quite large, a factor of more than 1000 is possible. The consequences for the properties will be discussed in the present paper applying a brick-layer model (BLM) for calculating dc-resistivities of thin layers and a modified one (PBLM) that includes percolation for calculating dielectric properties of these materials. The PBLM results in an at least qualitative description and understanding of the physical phenomena: This model gives an explanation for the steep increase of the dielectric constant below the percolation threshold and why this increase is connected to a dramatic decrease of the breakdown voltage as well as the ability of storing electrical energy. We conclude that metallic electrolyte composites like BaTiO₃ are not appropriate for energy storage.
Author: | Hans Lustfeld, C. Pithan, Martin Reißel |
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DOI: | https://doi.org/10.1016/j.jeurceramsoc.2011.10.017 |
ISSN: | 0955-2219 |
Parent Title (English): | Journal of the European Ceramic Society |
Publisher: | Elsevier |
Place of publication: | Amsterdam |
Document Type: | Article |
Language: | English |
Year of Completion: | 2012 |
Volume: | 32 |
Issue: | 4 |
First Page: | 859 |
Last Page: | 864 |
Link: | https://doi.org/10.1016/j.jeurceramsoc.2011.10.017 |
Zugriffsart: | campus |
Institutes: | FH Aachen / Fachbereich Medizintechnik und Technomathematik |
collections: | Verlag / Elsevier |