Field Grading Composites Tailored by Electrophoresis — Part 1: Principle and Permittivity Gradient in Uniform Electric Field

A series of three articles present an innovative way to build advanced functionally graded materials (FGM) based on polymer/ceramic composites tailored by electrophoresis from the process principle their field grading application in power electronics. In this Part 1, is presented and relies applying a DC voltage liquid composite compound before curing order `freeze' particles where they have been accumulated. To exemplify principle, FGM involving epoxy resin with SrTiO3 high-k permittivity gradient are presented. The methodology characterize them carried out. An accumulated particle region observed at high electrode while depleted bulk remains unmodified. This layer both increases thickness filler densification increasing and/or time allowing tuning its permittivity. work paves development more robust electronic systems electrical fringe critical regions can be mitigated.