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Super High Threshold Percolative Ferroelectric/Ferrimagnetic Composite Ceramics with Outstanding Permittivity and Initial Permeability
Author(s) -
Zheng Hui,
Dong Yanling,
Wang Xin,
Weng Wenjian,
Han Gaorong,
Ma Ning,
Du Piyi
Publication year - 2009
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200904269
Subject(s) - materials science , permittivity , ferroelectricity , ferrimagnetism , percolation threshold , ferrite (magnet) , composite number , composite material , ceramic , permeability (electromagnetism) , ferroelectric ceramics , percolation (cognitive psychology) , dielectric , magnetization , electrical resistivity and conductivity , optoelectronics , magnetic field , electrical engineering , chemistry , physics , engineering , quantum mechanics , neuroscience , membrane , biology , biochemistry
Some good percs : Ferroelectric/ferrimagnetic composite ceramics with percolation thresholds of 0.85–0.95 were obtained by an in situ sol–gel process that leads to enwrapping and separation of the conductive ferrite by a ferroelectric phase, e.g. BaTiO 3 . Such a super high threshold leads to a sharp increase in permittivity ( ε ) and initial permeability ( μ i ) with increasing ferrite fraction (see graph; NZFO=Ni 0.5 Zn 0.5 Fe 2 O 4 ).