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New Percolative BaTiO 3 –Ni Composites with a High and Frequency‐Independent Dielectric Constant (ϵ r ≈ 80000)
Author(s) -
Pecharromán C.,
EstebanBetegón F.,
Bartolomé J. F.,
LópezEsteban S.,
Moya J. S.
Publication year - 2001
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/1521-4095(200110)13:20<1541::aid-adma1541>3.0.co;2-x
Subject(s) - materials science , dielectric , composite material , capacitor , ferroelectricity , high κ dielectric , nickel , insulator (electricity) , yield (engineering) , metal , optoelectronics , metallurgy , voltage , electrical engineering , engineering
A novel capacitor device with a high, frequency‐independent dielectric constant has been fabricated by a simple powder processing route. A mixture of microparticles of ferroelectric BaTiO 3 and de‐passivated metallic nickel was sintered to yield percolative composites in which the system of conducting particles separated by insulator layers (see Figure for an SEM image) exhibits a dielectric constant higher than that of either component.