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Dielectric Behavior of Na 0.5 Bi 0.5 TiO 3 ‐Based Composites Incorporating Silver Particles
Author(s) -
Lin Yuanhua,
Nan CeWen,
Wang Jianfei,
Liu Gang,
Wu Junbo,
Cai Ning
Publication year - 2004
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2004.00742.x
Subject(s) - dielectric , materials science , composite material , sintering , ceramic , percolation threshold , percolation (cognitive psychology) , atmospheric temperature range , permittivity , particle (ecology) , metal , electrical resistivity and conductivity , metallurgy , thermodynamics , biology , oceanography , physics , optoelectronics , engineering , neuroscience , geology , electrical engineering
The dielectric properties of Na 0.5 Bi 0.5 TiO 3 (NBT) ‐based composites incorporating silver particles prepared by sintering at a low temperature of ∼900°C are reported. The dielectric constant increases with the amount of metal silver particles in the measured frequency range (150 Hz to 1 MHz), and could be enhanced up to ∼20 times higher than that of pure NBT ceramics, which was ascribed to the effective electric fields developed between the dispersed particles in the matrix and the percolation effect. Further investigation revealed that the dielectric constant of the composites has weak frequency and temperature dependence (−50°C to +50°C).