Fabrication technique of permittivity graded materials using particle movement simulation

For the size reduction and the reliability enhancement of electric power equipment, the electric field stress around solid insulators should be optimized. For the relaxation and optimization of the electric field stress, the application of FGM (Functionally Graded Materials) with spatial distribution of dielectric permittivity can be an effective solution. In this paper, we investigated the fabrication feasibility of FGM for reducing the electric field stress on the electrode surface in contact with the solid insulator. Then, we developed a simulation technique for fabrication of FGM and compared it with fabricated samples. Calculated results agreed well with the experimental ones. Consequently, effective techniques for FGM application to electric power equipment were developed.