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Percolation study by infrared thermography
Author(s) -
Henry F.,
Costa L. C.
Publication year - 2005
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.20816
Subject(s) - percolation (cognitive psychology) , materials science , percolation threshold , microwave , infrared , thermography , electromagnetic shielding , polystyrene , phase (matter) , conductivity , composite number , percolation theory , composite material , electrical resistivity and conductivity , polymer , optics , electrical engineering , physics , telecommunications , engineering , neuroscience , quantum mechanics , biology
In two‐phase materials, where the electrical conductivity of the disperse phase is significantly different than that of the host phase, the conductivity versus concentration of the dispersed phase shows percolation behaviour. In order to control the percolation threshold, we prepare a new composite polymer, based on polystyrene (PS) and polypyrrole (PPy) particles, to be used as electromagnetic shielding material. The critical concentration of the percolation was controlled, thus changing the ratio of the size of those particles. In this work, we present a study of the percolation behaviour using infrared thermography stimulated by microwave radiation at 12 GHz and the results are compared with the dc and ac electrical properties. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 45: 335–337, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20816