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Fabrication of basalt cotton/polytetrafluoroethylene (BC/PTFE) composite fiberboards with excellent dielectric properties over a wide frequency range

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Abstract

To expand the field of application of basalt cotton (BC) and BC-based composites, BC/PTFE (polytetrafluoroethylene) composite fiberboards were prepared by embedding a PTFE filler into a BC matrix using a wet method. The mechanical and dielectric properties of the composites were investigated. The experimental results indicate that the composites prepared using a concentration greater than 4 wt% PTFE could maintain the structural stability of the fibers in BC under high stress. The dielectric constant of BC/PTFE composites exhibited good frequency stability over a wide frequency range. The PTFE filler facilitated a decrease in the dielectric constant and dielectric loss, and the dielectric loss values of all composites remained below 0.007. The dielectric constants of the BC/PTFE composites were stable over a wide temperature range, and when PTFE content increased, the constant values were large within a stable temperature range.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 51772221), the National Natural Science Foundation of China (No. 51902229), and the Key Program of Natural Science Foundation of Hubei Province, China (No. 2017CFA004).

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Authors and Affiliations

  1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, People’s Republic of China

    Zimeng Zhou, Yuanbing Li, Ruofei Xiang, Shujing Li, Han Luo & Hailu Wang

  2. National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan, 430081, People’s Republic of China

    Yuanbing Li, Ruofei Xiang & Shujing Li

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  1. Zimeng Zhou
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  2. Yuanbing Li
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  3. Ruofei Xiang
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  4. Shujing Li
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  5. Han Luo
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  6. Hailu Wang
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Correspondence to Yuanbing Li or Ruofei Xiang.

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Zhou, Z., Li, Y., Xiang, R. et al. Fabrication of basalt cotton/polytetrafluoroethylene (BC/PTFE) composite fiberboards with excellent dielectric properties over a wide frequency range. J Mater Sci: Mater Electron 32, 12275–12282 (2021). https://doi.org/10.1007/s10854-021-05856-z

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  • DOI: https://doi.org/10.1007/s10854-021-05856-z

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