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

Journal
Particuology  
Volume
42
Start Page
184
End Page
189
Citation
Particuology 42: 184-189 (2019-02)
Publisher DOI
10.1016/j.partic.2018.03.006
Scopus ID
2-s2.0-85051125962
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.
Subjects
Coating
Fine particles
High relative permittivity
Metal–polymer composite
Spouted bed