Synthesis and Dielectric Behavior of a New Two-Phase Percolative BaTiO₃-Cu/Polyimide Composite

Abstract:

The chemical reduction method was used to deposit copper nanoparticles (about 20nm) on the surface of the barium titanate (BT, r=50nm). Then the dielectric properties and the mechanism of BaTiO₃-Cu/polyimide composite were studied. The results showed that the effective dielectric permittivity of the composite with 60 w_t% of BT-Cu (less than 13.00 w_t% of copper) fillers was greater than 120, and the dielectric loss of which was lower than 0.025. Due to very low dielectric loss, so this composite was a two-phase composite material, different from the three-phase composite (metal-ceramics-poly). It was concluded that copper nanoparticles were deposited on the surface of the BT nanoparticles by chemical bond. Owing to good dielectric properties of as-prepared composite, such new two-phase composites had a potential to become the most important ferroelectric material.

• Periodical: Applied Mechanics and Materials (Volumes 670-671)
• Pages: 263-266
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.670-671.263
• Online since: October 2014
• Authors: Zhi Long Pan*, Jia Ting Chen, Shi Liang Ao, Jian Ping Jia
• Keywords: Barium Titanate, Copper Nanoparticles, Dielectric Property, New Two-Phase Composites

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