Production of composites with high relative permittivity using the spouted bed technique--颗粒学报PARTICUOLOGY

Eichner, E., Fischer, P. K., Heinrich, S., & Schneider, G. A. (2019). Production of composites with high relative permittivity using the spouted bed technique. Particuology, 42, 184-189. https://doi.org/10.1016/j.partic.2018.03.006

Production of composites with high relative permittivity using the spouted bed technique

E. Eichner ^a *, P.-K. Fischer ^b, S. Heinrich ^a, G.A. Schneider ^b

a Institute of Solids Process Engineering and Particle Technology, Denickestr. 15, 21073 Hamburg, Germany
b Institute of Advanced Ceramics, Hamburg University of Technology, Denickestr. 15, 21073 Hamburg, Germany

10.1016/j.partic.2018.03.006

Volume 42, February 2019, Pages 184-189

Received 15 November 2017, Revised 30 January 2018, Accepted 4 March 2018, Available online 9 August 2018, Version of Record 21 January 2019.

E-mail: eduard.eichner@tuhh.de

Highlights

• Spouted bed was used to fabricate copper–polymer composites.

• The fabricated composites possessed high relative permittivity and copper filling degree.

• The composite with a copper content of 78.1 vol% displayed a maximum relative permittivity of 214.

Abstract

This contribution presents a new application of the spouted bed technique. The developed production process involves coating fine copper particles with a polymer in a spouted bed plant and then hot pressing the produced granules to form a compact consisting of a copper–polymer composite with a high filling degree. The fabricated composites possess high relative permittivity, which is advantageous for the production of effective capacitors. With increasing filling degree of copper, the relative permittivity of the composites increased, with a maximum relative permittivity of 214 obtained for the composite containing 78.1 vol% copper. Such a high filling degree can be achieved with conductive particles without obtaining a conductive composite by using the spouted bed technology in the production process. The high relative permittivity results from the high filling degree of particles isolated by a polymer coating.

Graphical abstract

Keywords

Spouted bed; High relative permittivity; Fine particles; Coating; Metal–polymer composite

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