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Dielectric Behavior of Na0.5Bi0.5TiO3-Based Composites Incorporating Silver Particles

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The dielectric properties of Na0.5Bi0.5TiO3 (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).
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Keywords: dielectric materials/properties; perovskites; silver/silver compounds

Document Type: Research Article

Affiliations: State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084, P. R. China

Publication date: April 1, 2004

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