Dielectric Behavior of Barium Titanate/Carbon Fibers Composites

Abstract:

Conductor–insulator composites have been extensive researched for high dielectric constant. Most of them concentrated on metal polymers or metal ceramics. Barium titanate–carbon fibers composites were prepared by using a solid state reaction process with carbon fibers contents ranging from7 vol% to 23 vol%. Due to the high-aspect-ratio of carbon fiber, it was easy to produce a conducting network at much lower volume fraction. FESEM images illustrated that the carbon fibers influenced the densification and microstructure of the ceramics. Besides, addition of carbon fibers led to increase in dielectric permittivity, also had effects on the dielectric loss and ac conductivity. The dielectric and conductivity properties as a function of carbon fibers volume fraction were explained by the percolation theory.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 2101-2106
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.2101
• Online since: June 2017
• Authors: Zhong Yang Wang, Xin Yan Li, Run Hua Fan*, Pei Tao Xie, Kai Sun, Guo Hua Fan, Chuan Xin Hou, Xiang Zhang
• Keywords: AC Conductivity, Barium Titanate, Carbon Fiber, Dielectric Property

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