Refine
Year of publication
- 2012 (41) (remove)
Institute
- Fachbereich Medizintechnik und Technomathematik (41) (remove)
Document Type
- Article (41) (remove)
Keywords
- (Bio)degradation (1)
- Acceleration (1)
- Afterload (1)
- Anastomotic leakage (1)
- Aufschlagversuch (1)
- Autolysis (1)
- Calorimetric gas sensor (1)
- Cell permeability (1)
- CellDrum (1)
- Cellular force (1)
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.