Anomalous power law dispersions in ac conductivity and permittivity shown to be characteristics of microstructural electrical networks.
The frequency dependent ac conductivity and permittivity of porous lead zirconate titanate ceramic with the pore volume filled with water are shown to match the simulated electrical response of a large network of randomly positioned resistors and capacitors. Anomalous power law dispersions in conductivity and permittivity are shown to be an electrical response characteristic of the microstructural network formed by the porous lead zirconate titanate pore structure. The anomalous power law dispersions of a wide range of materials are also suggested to be microstructural network characteristics.
Almond
D P
DP
Materials Research Centre, Department of Engineering and Applied Science, University of Bath, Claverton Down, Bath, BA2 7AY, United Kingdom.
Bowen
C R
CR