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Broadband dielectric and conductivity spectroscopy of inhomogeneous and composite conductors
Author(s) -
Petzelt Jan,
Nuzhnyy Dmitry,
Bovtun Viktor,
Savinov Maxim,
Kempa Martin,
Rychetsky Ivan
Publication year - 2013
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201329288
Subject(s) - materials science , dielectric , percolation threshold , percolation (cognitive psychology) , electrical conductor , pellets , dielectric spectroscopy , composite number , conductivity , polyaniline , conductor , composite material , condensed matter physics , electrical resistivity and conductivity , optoelectronics , electrical engineering , physics , polymer , electrochemistry , quantum mechanics , neuroscience , biology , engineering , polymerization , electrode
Present facilities in the Department of Dielectrics, Institute of Physics ASCR, enable us to study the complex dielectric/conductivity response of various dielectric, semiconducting and poor‐metallic conducting materials and their composites in the frequency range of 10 −5 –10 14 Hz (19 orders of magnitude). Here we summarize the phenomenological models used for fitting and basic understanding of such spectra, particularly of weak inhomogeneous and disordered conductors and composite conductor–dielectric materials within the effective medium approach. For the latter type of materials the electrical percolation phenomena are discussed. The obtained experimental results on several conductor–dielectric composites, particularly around their percolation threshold (PET‐CNT, alumina‐CNF, PZT‐PRO), porous conducting pellets (MoSI, WS 2 ), nanofiber matrix (PVDF‐WS 2 ), and variously conducting polyaniline pellets are briefly discussed.