Imants Matīss

Compact Representation and Statistical Significance of Measurement Data Reflecting Electric Properties of Polymer Nanocomposites

The paper is devoted to investigation of frequency-dependent electric properties of polymer nanocomposites. The experimentally acquired frequency characteristics of complex dielectric permittivity are substituted by equivalent mathematical models of dielectric relaxation. It is shown that such substitution is valid, provided that the selected relaxation model allows shaping the synthesized frequency curves in a sufficient range and the statistical significance of the measurement data is within a satisfactory range.

Investigation of Electric Properties of Nanocomposites in Frequency Domain - Compact Measurement Data Representation

The paper presents a procedure for mapping large amounts of experimental measurement data in a compact and representable form, preserving information on the properties of the research object for further investigations. The raw data set is compacted using mathematical description of dielectric relaxation. This approach provides a possibility to recover the dielectric properties for any frequency value, even extrapolating outside the actual measurement range. It also favours the understanding the causes for the measured phenomena and identification of imperfections within the measurement procedure.