Selection of a mixing model and determination of inclusion microwave permeability for a composite filled with metal powderстатья
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Дата последнего поиска статьи во внешних источниках: 29 марта 2018 г.
Аннотация:A method to retrieve permeability of a metal inclusion from the measured constitutive parameters of a single composite sample of known structure and filling is developed. Treating constitutive parameters for a set of fillings increases accuracy of inclusion permeability determination and makes it possible to select the appropriate mixing model for the composite. The method is applied to determine microwave permeability of sendust inclusions from the measured permeability and permittivity spectra for a set of composites filled with sendust flakes and spheres. The calculations are performed for symmetric (Bruggeman type) and for matrix (Maxwell Garnett type) structures. The composites are shown to have the matrix structure. The retrieved permeability of inclusions is in good agreement with the data calculated with the parameters of generalized matrix mixing model that accounts for percolation threshold.