  Dielectric gradient components have advantages in electric field mitigation
and insulation improvement. In this paper, we propose a fabrication method for
adaptive dielectric gradient components using in situ AC electric field,
including the mechanism and the corresponding operational procedures for
industrial applications. Based on the electric polarization and self-assembly
effect of the filler particles in the liquid matrix, the chain-like structure
in the high field strength region is constructed to enhance the local
permittivity and mitigate the maximum of the spatial electric field. The
dielectric gradient basin insulator is prepared by this method, and its
flashover voltage is increased by 12.8% compared with that of a homogeneous
dielectric basin insulator, and the improvement is 20.8% when metal particles
are present on the surface. The more non-uniform the initial electric field is,
the greater the improvement in flashover voltage. This method is expected to
promote the industrial application of dielectric gradient insulating
components.
